This is the most reliable and official method for MTK devices. The SN Writer tool is a MediaTek utility designed specifically to write IMEI numbers and serial numbers to the phone's NVRAM (Non-Volatile Random Access Memory).
*#*#4636#*#* – Testing menu (not directly for writing IMEI, but useful to check phone info). mt6580 imei repair code
works for MT6580 IMEI repair on locked/unrooted stock ROMs. The AT+EGMR code inside Engineer Mode is your best dialer-based option — but only after rooting. For reliable results, use Maui META or SN Writer on a Windows PC. Avoid “IMEI repair apps” from unknown sources — most are scams or malware on this platform. This is the most reliable and official method
For stubborn MT6580 devices where the IMEI reverts back to "Invalid" every time the phone restarts, the provides an industrial-grade flashing method used by repair technicians. works for MT6580 IMEI repair on locked/unrooted stock ROMs