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If the IMEI shows as "Null" or "Invalid" due to corruption, and the software tool fails, you may need to rewrite the modem partition.
Ensure you use the TFT Driver Installer or official SPD drivers if your PC does not recognize the phone in "Spreadtrum COM Port" mode.
Spreadtrum/UNISOC processors utilize dedicated firmware architectures distinct from MediaTek (MTK) or Qualcomm. Consequently, general Android codes will not unlock these deep system settings. The engineering menu provides direct access to the Baseband and Radio Frequency (RF) parameters required to rewrite cellular identification data. The Master SPD IMEI Repair Codes
Some manufacturers deliberately strip Engineer Mode out of their customized Android skins. If the codes fail, you must resort to the PC WriteIMEI Tool method. spd android imei repair code
A multi-functional repair tool that supports many SPD keypad and smartphones. Essential Requirements for Repair
The most effective way to repair IMEI on Spreadtrum/UNISOC phones is using the official on a PC. Prerequisites Windows PC
Changing the IMEI number to a different number is illegal in many countries, as it can be used to bypass blacklisting. If the IMEI shows as "Null" or "Invalid"
You will see text fields for Phone 1 (SIM 1) and Phone 2 (SIM 2). Enter the original 15-digit IMEI numbers found on the sticker beneath the phone's battery or on the original retail packaging.
If you search for SPD "codes," you will likely only find codes to view the IMEI or enter diagnostic mode, not to change it.
For Spreadtrum (SPD/UNISOC) Android devices, repairing a corrupted or "Invalid IMEI" typically involves using specific dialer codes to enter Engineer Mode or utilizing PC-based tools like Common Dialer & Engineer Mode Codes Consequently, general Android codes will not unlock these
Several standalone freeware tools (like SN Writer for SPD ) exist. These require your phone to be in .
Disconnect your phone and reboot it. Open your phone dialer and type . This universal code will display the current IMEI. If the 15-digit number matches the sticker on your phone box, your repair was successful! Alternative Solutions (Without a PC)