Pro tip: If you have a newer phone (2020+), download the arm64-v8a version. For older devices, look for armeabi-v7a.
To play the legitimate version of SRB2 on your phone, you need to use a source port. The most reliable way to play currently involves downloading the game files and running them through a compatible launcher. Download Sonic Robo Blast 2 For Android
Prerequisites:
SRB2 is a free, open-source fangame using original assets (no ROMs required). The Android port is unofficial but widely accepted. Always download from the official SRB2 site or verified GitHub releases to avoid malware. Pro tip: If you have a newer phone
Once the .apk file is downloaded: