This is a common firmware glitch in SPD (Spreadtrum) processors. When this happens, your phone is essentially a mini-tablet with no cellular function. The solution? An .
The most famous and frequently cited is: *#*#3646633#*#* However, that is the generic MediaTek engineering code. SPD has its own. Depending on the brand and Android version (Go Edition, Android 10/11/12 Go), the codes vary. spd android imei repair code
Type exactly: *#*#83781#*#* Your screen should instantly switch to a white or blue background menu titled "Engineer Mode." If that code doesn't work, try *#*#2580#*#* (for Unisoc). This is a common firmware glitch in SPD
Erase the existing command and type exactly (case sensitive): AT+EGMR=1,7,"YOUR_15_DIGIT_IMEI" Depending on the brand and Android version (Go
Power off your phone completely, wait 10 seconds, and turn it back on. Dial *#06# to verify your IMEI has been restored. Part 4: Why the SPD Code Fails (And What to Do Next) If you entered *#*#83781#*#* and nothing happens, or the AT command returns ERROR instead of OK , you are facing one of three problems: Problem 1: The Code is Blocked by the Carrier/Brand Manufacturers like Samsung (on their J-series with SPD chips) or modern Android 12+ Go edition phones disable dialer codes for security. The code simply won't work.
You need to restore a backup of the NVRAM or use a professional SPD flashing tool. Problem 3: You Don't Have Root Access Newer SPD phones (Android 11+) restrict the Engineer Mode from writing to the NVRAM without elevated permissions. You will see ERROR after hitting send.