The Samsung B310E (Guru Music 2) is a Spreadtrum-based feature phone that often requires flashing to resolve issues like sim locks, forgotten phone passwords, or dead-on-arrival software errors. Using the Infinity CM2 (Chinese Miracle 2) dongle is a common professional method for these repairs. Flash File Requirements
SIM Lock: CM2 is specifically effective for removing SIM locks on this model via the "Sim Lock Remove" function in the tool.
Error During Flash: Ensure the battery is at least 50% charged. If the process stops, try a different version of the CM2 tool or another tested flash file.
The Samsung Guru Music 2 (SM-B310E) is a popular feature phone known for its reliability, but software issues like "Contact Service," hang-on-logo, or forgotten phone locks can render it unusable. To fix these, you can use the Infinity-Box Chinese Miracle 2 (CM2) dongle to flash the official firmware. Essential Requirements Before starting, ensure you have the following:
Alternative: Install Samsung Kies 3 (old version) – it also includes drivers, but the standalone driver is better.
Samsung B310E Flash File (CM2) – Free Download & No Password Guide
Last Updated: October 2025
Model: Samsung GT-B310E (Guru Music 2)
File Version: CM2