Ensure the MediaTek (MTK) or relevant USB drivers are installed on your PC.
The actual operating system data (system, boot, recovery, etc.). BLU.1306720WRZ.rar
Turn off the phone and connect it to the PC (sometimes while holding a volume button) to begin the update. Ensure the MediaTek (MTK) or relevant USB drivers
A text file that tells the flashing tool (like SP Flash Tool) where to install each part of the software. BLU.1306720WRZ.rar
Flashing the wrong firmware can permanently damage ("hard brick") your phone. Always double-check that your specific model number matches the one intended for this file before proceeding.