button as the boot key and connect the phone to your PC via USB cable.
If you do not have a CM2 dongle, you can use free software like the or Upgrade Download Tool .
dongle or similar tools, you generally need the original PAC firmware file and the appropriate SPD (Spreadtrum) drivers. 1. Preparation Requirements Before starting, ensure you have the following: Flash File: You need the official Samsung B310E PAC file
Power off the phone. Hold the center "OK" button (Boot Key) while connecting it to the PC via USB.