One wrong byte can hard-brick the radio.
🎯 Always back up your NVRAM partition via custom recovery or SP Flash Tool before making any firmware modifications on an MT6771 device to avoid this issue entirely. Mt6771 Imei Repair
is a widely used processor in mid-range smartphones. During custom ROM flashing, formatting, or updating, users frequently experience a corrupted NVRAM (Non-Volatile Random-Access Memory). This corruption causes the device to lose its International Mobile Equipment Identity (IMEI) or display it as "Unknown" or "Null," effectively cutting off all cellular services. One wrong byte can hard-brick the radio
Technicians typically use specific software tools to communicate with the MT6771's modem in Mt6771 Imei Repair