Repair shops use hardware boxes like UFS HWK, JAF, or Cyclone Box. These are expensive but offer the most stability. However, for DIY enthusiasts, there are software-only alternatives.
The device keeps restarting or freezes on the "Nokia" logo. This often happens after an OTA update failure or incompatible app installation. nokia rm 645 flash file
If your RM 645 shows no sign of life:
A standard micro-USB or the specific Nokia connector cable (CA-101 or DKU-5 depending on exact model variants) is essential. A loose cable during flashing can permanently brick the phone. Repair shops use hardware boxes like UFS HWK
Users typically seek the flash file to resolve critical software issues, including: A standard micro-USB or the specific Nokia connector