SN Write Tool is MediaTek’s dedicated IMEI writer but works best with stock firmware scatter files.
There are two primary methods for MT6771. You should try Method 1 first, as it is the standard for Oppo/Vivo devices using this chip. Mt6771 Imei Repair
| Problem | Solution | |---------|----------| | SN Write Tool stuck at “Waiting for phone” | Reinstall VCOM drivers; try different USB port; ensure device is powered off. | | Maui META fails to connect | Enable “USB debugging” and “META mode” in developer options (if available). | | IMEI reverts after reboot | NVRAM is write-protected; format NVRAM first or use SP Flash Tool with “Format All + Download” (⚠️ risky). | | No service after IMEI repair | Check baseband version; reflash modem or ltecfg partition. | SN Write Tool is MediaTek’s dedicated IMEI writer
Based on the severity of the corruption, apply one of these three methods. Based on the severity of the corruption, apply