Nokia Ta 1468 Test Point «POPULAR ⟶»
Cause: The flasher tool's Download Agent (DA) file is incompatible with Unisoc Android 11 security. Fix: Use an updated tool (e.g., Unisoc Android 11 Fix DA from UnlockTool or latest Research Tool v5.0+).
Working with test points carries inherent risks. The Nokia TA-1468 is an affordable device, but improper handling can render it permanently useless.
A test point on a mobile phone motherboard is a specific, exposed copper contact designed by engineers for factory debugging and hardware diagnostics. In the context of the Nokia TA-1468, which utilizes a Unisoc (Spreadtrum) processor, the test point is used to force the CPU into a "Download Mode" or "Calibration Mode."
When a phone is functioning normally, it boots into its operating system. However, if the software is corrupted, the bootloader is damaged, or the phone is stuck in a boot loop, standard USB communication methods often fail. The test point creates a hardware-level interrupt, forcing the processor to halt its standard boot sequence and wait for instructions from a connected computer.
Follow this sequence precisely. The timing is critical.
Cause: The short was released too early or the preloader driver is incorrect. Fix: Hold the short longer. Try holding it until the PC makes two distinct "connect/disconnect" sounds. Also, manually update the driver to "SPREADTRUM USB Port" from Device Manager.
If you want, I can provide step-by-step pictures or a board-view coordinate lookup for the TA-1468—tell me whether you prefer a photo-guided teardown or the chipset model so I can assume the correct flashing tool.
The smell of burning flux and stale coffee hung heavy in the air of Raj’s repair shop, "Mobile City." It was a Tuesday, which meant it was the day the local scrap dealers dumped their "unsolvable" piles on his counter.
Raj wiped his hands on a rag, looking at the plastic corpse in front of him. It was a Nokia TA-1468—a budget Nokia C12 Plus. To the average person, it was just a cheap phone. To a technician, it was a fortress.
"This one is dead, boss," his apprentice, Veer, said, hovering over the device with a DC power supply. "No shorts on the battery connector, but when I hook it up, zero amps. It’s not drawing any current. The PMIC (Power Management IC) is probably gone, or the CPU is toasted."
Raj picked up the phone. The screen was cracked, but the body was surprisingly intact. He plugged it into his USB ammeter. Nothing. He tried holding Volume Up and Power. Nothing.
"It’s not hardware damage, Veer," Raj muttered, peering through his stereo microscope. "Look at the charging port. It’s loose. Someone jammed a cable in here too hard. They probably knocked the filters or ripped a pad. The phone thinks it's always disconnected."
"New charging port?" Veer asked.
"On these budget Nokias, the port is soldered to the main board, but the board is glued into a plastic frame with the battery on top. It’s a nightmare to take apart without cracking the screen further," Raj said. "And if we replace the port, we still have to bypass the boot security to get it to turn on. The battery died during the crash. It’s in deep sleep. We can’t wake it up via USB because the port is broken."
Raj sighed. He hated giving up on Nokias. They were built like tanks, but their software security was a steel trap. If the battery was dead and the USB logic was broken, the phone was a brick.
Unless.
"Move over," Raj said, nudging Veer away from the bench. He grabbed his fine-tip soldering iron and a bottle of rosin. "We aren't fixing the port today. We are going in through the back door."
"The Test Point?" Veer asked, his eyes widening. "But we don't have the diagram for TA-1468. It’s too new."
"The architecture is Unisoc," Raj said, flipping the phone over. He peeled off the sticker covering the sim tray area, then used a heat gun on low setting to soften the adhesive holding the rear plastic shell. He gently pried it open, exposing the motherboard shield.
"Unisoc CPUs all speak the same language when they are scared," Raj grinned. "Emergency Mode."
He carefully removed the metal shield covering the CPU and flash memory. Underneath lay a miniature city of gold traces and black chips.
"Turn off the lights," Raj ordered.
Veer hit the switch, plunging the room into darkness, illuminated only by the glow of the soldering station and the beams from their headlamps.
Raj looked through the lens. He needed to find the specific copper pad—the "Test Point." This was a tiny exposed dot on the motherboard designed by engineers for factory testing and emergency firmware recovery. Shorting this point to ground while connecting USB forced the processor to bypass the normal boot sequence and enter "Brom Mode." It was the digital equivalent of a defibrillator.
"Find the map," Raj whispered. He didn't have a schematic, but he had experience. He looked for a tiny dot near the CPU, usually isolated, often covered by a faint white outline.
He saw a cluster of test pads. One was for the charging dock. One was for the speaker. And there, tucked right under a capacitor near the Unisoc chipset, was a tiny, golden square.
"Is that it?" Veer asked, pointing a shaky finger.
"Only one way to find out," Raj said. He took a thin copper wire, tinned the end with a tiny bead of solder, and touched it to the gold pad. With the other hand, he grounded the wire to a metal shield nearby.
"Hold the USB cable," Raj commanded. "Plug it into the computer, then the phone."
Veer plugged the USB-C cable into the PC. The PC made a 'ding' sound—device not recognized. Then he plugged it into the Nokia.
Raj pressed the wire firmly onto the Test Point.
Ba-ding.
The sound from the PC was different this time. A low, double-pitched chime.
"It's detected!" Veer shouted.
Raj kept his hand steady, not daring to breathe. He looked at the device manager on the PC screen. It didn't say "Nokia TA-1468." It didn't say "Charging."
It read: SPRD U2S Diag Port.
"Got it," Raj exhaled, lifting the wire. "The CPU is awake. It's begging for firmware."
He quickly opened his flashing tool software. Because the Test Point had forced the phone into Download Mode, the computer could now communicate with the phone directly, bypassing the broken charging port entirely.
"Load the firmware," Raj told Veer. "Stock ROM for TA-1468."
Veer scrambled to the server and dragged the scatter file into the tool.
"Download," Raj clicked the button.
A progress bar appeared on the screen. Formatting... Downloading...
Usually, this would take minutes. But with the Test Point active, the data flowed like water
The Nokia TA-1468 Go to product viewer dialog for this item. , also known as the Nokia C2 2nd Edition Go to product viewer dialog for this item.
, often requires a "test point" for advanced servicing like unbricking, flashing firmware, or removing a Google FRP lock.
Since this device uses a MediaTek (MTK) chipset rather than a Qualcomm one, the term "test point" is frequently used by technicians to refer to the hardware pins that force the device into BootROM (BROM) mode. This mode is essential for tools like Unlock Tool, Pandora, or Phoenix Service Tool to communicate with the phone when it is locked or unresponsive. Finding the Nokia TA-1468 Test Point
To use the test point, you must carefully open the device's back cover to access the internal motherboard. Location: The test points for the nokia ta 1468 test point
are typically two small gold pads located near the battery connector or the CPU shielding.
Function: Shorting these pads to the ground (any metal shield on the board) while connecting the USB cable forces the phone into a pre-loader state. This allows the computer to recognize it as an MTK USB Port. Tools Used for Servicing via Test Point
Technicians typically use the following paid professional software to service the via the test point:
Unlock Tool: Highly popular for one-click FRP removal and factory resets on the
Phoenix Service Tool: Often used for more stable flashing and official firmware restoration.
SP Flash Tool: A free alternative, though it usually requires a "DA" (Download Agent) or an "Auth file" to bypass Nokia's security. Step-by-Step Procedure Power Off: Ensure the phone is completely switched off.
Disassemble: Use a thin pry tool to remove the back cover. You may need to unscrew the internal plastic shield to see the motherboard.
Short the Pins: Use metal tweezers to connect the specific test point pad to a nearby metal ground.
Connect USB: While holding the short, plug the USB cable into your PC.
Check Device Manager: Your PC should show "MediaTek USB Port" under the Ports (COM & LPT) section. Run Tool:
Use your preferred software (like Unlock Tool) to select the Nokia C2 2nd Edition model and perform the desired task (Reset, FRP, or Flash). Alternative: Servicing Without a Test Point
For simpler tasks like a standard factory reset, you can often avoid opening the phone by using button combinations: Nokia C2 2nd Edition - Full phone specifications
A very specific topic!
Guide: Nokia TA-1468 Test Point
Introduction
The Nokia TA-1468 is a popular mobile phone model, and like any other phone, it has its own set of troubleshooting and repair requirements. One of the key aspects of repairing a phone is understanding its test points. In this guide, we'll explore the Nokia TA-1468 test point, its location, and how to use it for troubleshooting and repair purposes.
What is a Test Point?
A test point is a specific point on a phone's circuit board that allows technicians to access and measure various electrical signals, voltages, and currents. Test points are used to diagnose and troubleshoot issues with the phone's hardware, such as faulty components, short circuits, or connectivity problems.
Nokia TA-1468 Test Point Location
The Nokia TA-1468 test point is located on the phone's motherboard, near the charging port. The test point is usually marked with a small label or a silkscreen print on the PCB (Printed Circuit Board).
Test Point Pinout and Description
The Nokia TA-1468 test point typically consists of the following pins:
How to Use the Nokia TA-1468 Test Point
To use the test point, you'll need a multimeter or a similar measurement tool. Here's a step-by-step guide:
Common Issues and Solutions
Some common issues that can be diagnosed using the Nokia TA-1468 test point include:
Conclusion
The Nokia TA-1468 test point is a valuable resource for technicians and DIY enthusiasts who want to troubleshoot and repair issues with the phone's hardware. By understanding the test point pinout and using a multimeter, you can diagnose and potentially fix common problems with the phone. However, be careful when working with electrical components, and always follow proper safety precautions to avoid damage or injury.
It was 2:47 AM when the package arrived—no labels, just a worn cardboard box and the faint smell of solder. Inside, wrapped in an anti-static bag, lay a Nokia TA-1468. Not new. Not old. Wrong.
Jesse turned it over in his hands. The screen was dark, but a green LED pulsed weakly near the earpiece—three slow blinks, pause, repeat. He’d seen that pattern before. It meant deep lock. No factory reset, no flash tool, no combo key press could touch it. The device was a brick with a heartbeat.
But the TA-1468 had a secret. Buried in the third revision of the leaked service manual—the one Nokia never admitted existed—was a diagram labeled “Test Point: RM-1468 Rev. C”. Two tiny pads, hidden under the EMI shield next to the eMMC chip. Bridge them with a wire at the exact moment the bootROM polls the secure boot fuse, and the chip would spill its guts: raw memory access, bootloader disabled, security flags wide open.
Jesse’s hands were steady. He’d done this on older Nokias—the 8110, the 6.1, even a stubborn 7 Plus. But this one felt different. The manual warned: “Test point activation voids integrity. Device will no longer verify signature chain after bypass.” In plain English: once you do this, the phone trusts anything.
He peeled off the back cover. No screws—just clips and prayer. The motherboard came out easily, almost too easily, as if it wanted to be found. Under the shield, there they were: TP168 and TP169, smaller than grains of sand. He tinned a strand of copper wire, held his breath, and touched both pads at once.
The green LED turned solid white. The screen flickered—not the usual boot logo, but a single line of text:
BROM: UART enabled. Waiting for handshake.
Jesse connected his laptop. The serial console spat out addresses, partition tables, and then… a file listing. Not Android. Not KaiOS. A tiny, custom filesystem. And one folder name stood out:
/sys/telem/
Inside: logs. Years of them. Locations, keystrokes, audio samples, encrypted payloads. This wasn’t a phone. It was a ghost—a surveillance node that thought it was dead. The test point hadn’t unlocked the phone.
It had unlocked the truth.
Jesse closed the laptop slowly. The white LED blinked once, then faded to black. For a long moment, the only sound was the hum of the streetlamp outside. Then he picked up his screwdriver, carefully replaced the EMI shield, and closed the back cover.
He never turned the phone on again. But he kept it—in a metal box, wrapped in foil, at the bottom of a closet. Just in case someone else ever needed to find the test point.
Because some secrets aren’t meant to stay locked.
Nokia TA-1468 , also known as the Nokia C2 2nd Edition uses a test point method to enter EDL (Emergency Download) Mode
for servicing tasks like unbricking, flashing firmware, or bypassing FRP (Factory Reset Protection) DeviceAtlas Understanding the Nokia TA-1468 Test Point
A hardware test point is a specific set of pins on the device's motherboard that, when shorted, forces the processor—typically a
chipset in this model series—into a specialized boot mode. Device Identification : Nokia C2 2nd Edition (Model TA-1468). Cause: The flasher tool's Download Agent (DA) file
: Used when the device is "hard bricked" (won't turn on or enter recovery) or to bypass software locks using tools like UnlockTool Ultimate Multi Tool EDL Mode Connection
: Once the test points are shorted and the device is connected to a PC via USB, it should appear in the Device Manager as a specialized COM port (e.g., "MediaTek USB Port" or "Unisoc USB Serial"). Step-by-Step Procedure
: Opening your device and shorting motherboard pins carries the risk of permanent hardware damage and voids your warranty.
Nokia C2 2nd Edition - Full specifications, price and reviews
The Nokia TA-1468, also known as the Nokia C2 2nd Edition, requires the use of specific test points on its motherboard to enter EDL (Emergency Download) Mode or Unisoc Flash Mode. This hardware-level bypass is essential for performing advanced repairs such as unbricking a "dead" device, bypassing Factory Reset Protection (FRP), or flashing stock firmware when standard software methods fail. Understanding the Nokia TA-1468 Test Point
For the Nokia C2 2nd Edition (TA-1468), which typically uses a Unisoc chipset, the test point process involves physically bridging two specific metallic contacts on the PCB (Printed Circuit Board) using a pair of tweezers or a thin wire.
Function: Shorting these points forces the phone to be detected by a computer as a diagnostic port (e.g., "Unisoc USB Serial") instead of a standard charging or MTP device. Common Use Cases:
FRP Bypass: Removing the Google Account lock after a hard reset.
Dead Boot Repair: Fixing phones that no longer turn on or are stuck in a boot loop.
User Data Wipe: Removing forgotten screen patterns or PINs when recovery mode is inaccessible. Repair Tools and Software
Technicians often use specialized paid software in conjunction with the test point to interface with the device's internal memory:
UnlockTool: A popular choice for performing "one-click" FRP resets and factory wipes on this model.
Phoenix Service Tool: Specifically mentioned for TA-1468 FRP removal.
TFT Unlock Tool: An alternative for resetting security locks. Safety and Procedure
Accessing the test points requires disassembling the device, which usually involves removing the back cover and internal shielding to expose the motherboard. Nokia C2 2nd Edition - Full phone specifications
The Nokia TA-1468 , also known as the Nokia C2 2nd Edition , is a budget-friendly device running Android 11 (Go Edition). In the specialized world of mobile repair, the "test point" is a critical hardware feature used to force the device into EDL (Emergency Download) Mode or SPD/Unisoc Flash Mode, allowing for deep-level software fixes like unbricking or removing Factory Reset Protection (FRP). Nokia TA-1468 Test Point Usage
uses a Unisoc (formerly Spreadtrum) chipset. Unlike devices with simpler button-based recovery, hardware test points are often necessary when the software is corrupted or the bootloader is locked.
Functionality: Shorting the specific test points on the motherboard while connecting the USB cable triggers the Unisoc EDL Mode. This bypasses standard boot protocols to allow tools like UnlockTool or TFT Unlock to communicate directly with the memory.
Accessibility: To reach the test points, the back cover and internal plastic shielding must be removed, which can void warranties. This is primarily a professional repair technician's method rather than a standard consumer fix. Common Use Cases:
FRP Removal: Bypassing Google account locks after a hard reset.
Unbricking: Fixing "Dead Boot" scenarios where the phone won't turn on or enter recovery.
Firmware Flashing: Installing stock ROMs when standard methods fail. Key Specifications for Repair Context
Knowing these specs helps ensure you are using the correct drivers and firmware:
Chipset: MediaTek Quad-Core 1.5 GHz (Note: Some variants may vary by region, but is widely cited in Unisoc/EDL contexts for repair). Model Identification: Model ( Nokia C2 2nd Edition OS: Android 11 Go Edition. Safer Alternatives
Before attempting hardware shorting, technicians often try these less invasive methods: Nokia c2 2nd edition Frp Remove Ta1460 - TikTok
Introduction
The Nokia TA-1468 is a test point designed for use in mobile device testing and repair. It's a specialized tool used to access and test various components on a mobile device's motherboard. In this review, we'll take a closer look at the Nokia TA-1468 test point, its features, and its applications.
Overview of Nokia TA-1468 Test Point
The Nokia TA-1468 test point is a compact, portable device that connects to a mobile device's motherboard via a set of probes or test leads. It's designed to provide a safe and efficient way to test and diagnose issues with mobile devices. The test point is typically used in conjunction with a multimeter or other testing equipment to measure voltage, current, and resistance.
Key Features of Nokia TA-1468 Test Point
Here are some of the key features of the Nokia TA-1468 test point:
Applications of Nokia TA-1468 Test Point
The Nokia TA-1468 test point is used in a variety of applications, including:
Advantages of Nokia TA-1468 Test Point
Here are some of the advantages of the Nokia TA-1468 test point:
Limitations of Nokia TA-1468 Test Point
Here are some of the limitations of the Nokia TA-1468 test point:
Conclusion
The Nokia TA-1468 test point is a useful tool for mobile device testing and repair. Its compact design, multiple test points, and compatibility with a range of mobile devices make it a valuable asset for repair technicians, quality control engineers, and researchers. While it has some limitations, the test point is relatively easy to use and provides accurate measurements. Overall, the Nokia TA-1468 test point is a reliable and efficient tool for anyone working with mobile devices.
Rating
Based on its features, applications, advantages, and limitations, I would give the Nokia TA-1468 test point a rating of 4.5 out of 5 stars. Its ease of use, accuracy, and portability make it a valuable tool for mobile device testing and repair.
Recommendations
Based on this review, I would recommend the Nokia TA-1468 test point to:
However, I would not recommend the Nokia TA-1468 test point to:
For the Nokia C2 2nd Edition (TA-1468) Go to product viewer dialog for this item.
, finding a specific hardware test point diagram can be tricky because many technicians use the UnlockTool or Phoenix Service Tool to perform resets and FRP bypasses via software methods like Meta Mode or Fastboot, which often don't require opening the device. How to Use the Nokia TA-1468 Test Point
If you are specifically looking for the hardware test point to trigger EDL (Emergency Download) Mode, here are the most helpful resources and common locations: Recommended Resources & Guides
UnlockTool Guides: Several videos from Jadoon Mobile Tech and Rajko Sekulic
detail using the UnlockTool for TA-1468. While these focus on software, they often show the device board for context.
GSM Sanjoy (YouTube): This channel is a reliable source for hardware schematics and test point locations for various Nokia models. They have specific guides for related models like the Go to product viewer dialog for this item. and Go to product viewer dialog for this item. , which use similar board layouts.
Facebook Technician Groups: Detailed factory reset and Meta mode troubleshooting, including reports of "BROM disabled by efuse," can be found in specialized groups like Global Fix Central. General Test Point Location (Typical for TA-1468) For Nokia devices with Unisoc or MediaTek chipsets like the
, the test point is typically located near the CPU or the battery connector.
Visual Guide: You can view a walkthrough of the Nokia C2 2nd Edition FRP Bypass on YouTube for board context.
The Process: Typically involves shorting a small gold contact point (labeled 'TP') to the device's ground (GND) while connecting the USB cable to force the phone into a mode recognized by service tools. Software Alternatives (No Hardware Opening)
If your goal is a Factory Reset or FRP Bypass, try these non-invasive methods first:
Manual Hard Reset: Power off, then hold Volume Down + Power to enter Fastboot Mode. UnlockTool (Paid) : This is the most common "one-click" solution for the
, supporting FRP removal without needing to find a physical test point in many cases.
The Nokia TA-1468 (commercially known as the Nokia C2 2nd Edition) utilizes a Unisoc (SPD) chipset. Accessing the Test Point is essential for forcing the device into EDL (Emergency Download) Mode to perform firmware flashing, unbricking, or FRP bypass using professional tools like UnlockTool. 📍 Test Point Location
To find the hardware test points, you must remove the back cover and the internal plastic shield over the motherboard.
The Points: Look for two small golden pads located near the battery connector or the SIM tray area.
The Connection: You must use a pair of fine-tip tweezers to short these two pads together while simultaneously connecting the USB cable to your PC. 🛠️ Procedure for EDL Mode
Power Off: Completely shut down the device and disconnect the battery cable for a few seconds.
Short Pins: Use tweezers to bridge the two specific test point pads.
Connect USB: While holding the short, plug in the USB cable connected to your computer.
Verification: Check Device Manager on your PC. It should appear as "Unisoc USB Serial" or similar under the Ports section. ⚠️ Critical Prerequisites
Drivers: Ensure you have the Spreadtrum/Unisoc USB Drivers installed to ensure the PC recognizes the phone in EDL mode.
Flashing Tool: Professional service tools like UnlockTool or TFT Unlock are typically used for this model.
Safety: Opening the device and shorting pins involves hardware risk and may void your warranty.
💡 Pro Tip: If you only need a basic factory reset and still have access to the buttons, you can enter Recovery Mode by holding Volume Up + Power while the phone is connected to a charger. If you'd like to continue with software repair, tell me:
The specific error message you are seeing? (e.g., "Dead Boot", "FRP Lock")
Which flashing tool you plan to use? (e.g., UnlockTool, SPD Flash Tool) Nokia C2 2nd Edition - Full phone specifications
Nokia TA-1468 (Nokia C2 2nd Edition) features a MediaTek MT6739
. Because it uses a MediaTek platform, you typically do not need a physical "test point" (EDL mode hardware short) to perform service tasks like FRP (Google account) bypass or factory resets. Service Mode Entry
Instead of hardware test points, this model uses specific button combinations and software modes: META Mode / Boot Mode : Most professional tools, such as the Unlock Tool Ultimate Multi Tool (UMT) , interact with this device by: Powering the device off completely. Volume Up + Volume Down
(or sometimes just Volume Down) while connecting the USB cable to a PC. Recovery Mode : Used for standard manual resets. Power off, then hold Power + Volume Up When the "No command" screen appears, hold once to enter the full menu. Key Device Specifications Nokia C210 Hard Reset Removing PIN, Password, pattern No PC
The Nokia TA-1468, also known as the Nokia C2 2nd Edition, utilizes a test point to force the device into BootROM (BROM) mode. This hardware-level override is primarily used by technicians to bypass Factory Reset Protection (FRP), remove screen locks (pattern/PIN), or flash firmware when standard software methods or button combinations fail. Understanding the Nokia TA-1468 Test Point
The Nokia C2 2nd Edition is powered by a MediaTek MT6761 (Helio A22) chipset. In MediaTek devices, the test point acts as a bridge that triggers the pre-loader to enter a low-level diagnostic state known as BROM mode. This allows specialized service tools to communicate directly with the device's eMMC storage.
Model Identification: The TA-1468 model belongs to the Nokia C2 2nd Edition series, which features a 5.7-inch display and Android 11 Go Edition. Primary Use Cases:
FRP Bypass: Removing the Google Account lock after a factory reset.
User Lock Removal: Wiping patterns, PINs, or passwords when the user is locked out.
Unbricking: Flashing official firmware (Flash File) to fix boot loops or system errors. Requirements for Using the Test Point
Before attempting to use the test point, ensure you have the following tools and environment ready: Nokia C2 2nd Edition - Full phone specifications
Nokia C2 2nd Edition (TA-1468) Unisoc chipset . Accessing the Test Point (EDL Mode)
is essential for advanced software repairs such as unbricking, flashing firmware, or removing FRP (Factory Reset Protection) when the standard recovery mode is inaccessible. Technical Overview Nokia C2 2nd Edition (TA-1468). EDL (Emergency Download) / BROM Mode. Connection Port: Detected as "Unisoc USB Serial" or "SPD" in Device Manager. Procedure for Entering Test Point Mode
To force the device into EDL mode for flashing or bypassing security locks: Disassemble the Device:
Carefully remove the back cover and internal screws to access the motherboard. Disconnect Battery:
Always disconnect the battery connector first to avoid short-circuiting other components. Locate Test Points:
Use a pair of tweezers to short (connect) the specific gold test point to a Ground (GND) point on the motherboard. Connect to PC:
While keeping the point shorted to GND, plug in the USB cable. The PC should detect a new COM port. Software Tooling: Use supported software such as UnlockTool Pandora Box to perform the repair. Visual Reference for Motherboard Points
The following images provide visual guides for identifying the test points and ISP pinouts on various Nokia and Unisoc-based motherboards for reference. Nokia C2 2nd Edition FRP Remove Guide | TikTok
In the realm of mobile phone repair and firmware servicing, the "Test Point" is a critical concept. For the Nokia TA-1468 (a popular entry-level feature phone), accessing the test point is often the only viable method to recover a "dead" handset or bypass software locks. This article explores what the test point is, why it is used, and the precautions necessary when working with it.
Cause: You may have a different PCB revision. Look for a via (small hole) near the CPU that isn't connected to a trace. Sometimes, the test point is under the SIM tray or an EMI shield. Fix: Use a multimeter in continuity mode. Probe small pads near the CPU while touching ground. When you hear a beep, note that pad as a potential KCOLx line. Cross-reference with the unisoc pinout.