If you own a , the old Maui META tool will give you a "Authentication Failed" error. This is due to MediaTek's new Secure Boot (SLT).
: A free, official MediaTek utility used to calibrate and repair RF/IMEI parameters by putting the phone into Meta Mode. xiaomi imei repair tool mtk
Warning: Root methods are temporary on some MIUI updates; OTA updates will wipe changes. If you own a , the old Maui
Several tools are specifically designed to communicate with MediaTek hardware to restore or patch IMEI numbers. If you own a
Several professional and community tools are used for this process: