The is a secret dialer string used to access the Engineer Mode on devices powered by Spreadtrum (now Unisoc) chipsets. This hidden menu allows technicians and advanced users to restore or repair a corrupted IMEI number, which often results in "Invalid IMEI" or "No Service" errors. Common SPD IMEI Repair Codes
Once in the Engineer Mode menu, swipe to the Telephony or Connectivity tab. spd android imei repair code
Look for an option labeled Set IMEI or Radio Information . The is a secret dialer string used to