The International Mobile Equipment Identity (IMEI) is a unique 15-digit code that identifies every mobile device worldwide. It is the digital fingerprint that cellular networks use to authenticate a device, ensure it hasn't been reported stolen, and block it if necessary. For devices powered by the MediaTek MT6771 chipset—commonly known as the Helio P60—the integrity of this number is paramount for network connectivity.
This is the official software used to flash MediaTek chips. Mt6771 Imei Repair