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
If your device has a "Null" or "Invalid" IMEI, follow these steps to restore it using the dialer code: Launch your phone's calling app. Enter the Code: Dial *#*#83781#*#* . The is a secret dialer string used to
Carefully input the 15-digit IMEI number found on your device's original box or under the battery. If your device has a "Null" or "Invalid"
Tap Set IMEI and select OK when prompted to restart your device for changes to take effect. Why IMEI Repair is Necessary IMEI numbers can become "Invalid" due to:
Look for an option labeled Set IMEI or Radio Information .