An invalid or missing International Mobile Equipment Identity (IMEI) number turns your Android smartphone into an expensive paperweight. Without a valid IMEI, your device cannot connect to any cellular network, leaving you without calling, texting, or mobile data.

An IMEI (International Mobile Equipment Identity) number is the unique 15-digit identifier of your mobile device. For Android smartphones running on Spreadtrum/Unisoc (SPD) chipsets, a corrupted, invalid, or "000000000000000" IMEI can completely break cellular connectivity. This causes "No Service" or "Invalid SIM" errors.

However, always remember your legal and ethical duties. These methods are for restoring your phone's only. Misusing them can have serious legal consequences.

Tap the "SEND AT COMMAND" button (may say "AT+ SEND" or just "SEND"). You should see a message: OK or /n OK . This means the command was successful.

If you are encountering a specific error during this process, let me know the you are working on, the error message you see, or if the PC is failing to recognize your phone. Share public link

A phone dying or losing power in the middle of a critical system update.

: Always refer to the original device box or the bill to find your legal IMEI numbers if they have been lost due to a software flash [21].

While the exact steps vary by tool, the general process for using a PC to fix an SPD IMEI looks like this:

The SPD Android IMEI repair code is a specific code used to repair or restore the IMEI number on SPD-based Android devices. This code is usually generated using a specialized tool or software, taking into account the device's model, firmware version, and other relevant details.

You should see a new port, usually listed as or similar. Step 5: Write the IMEI In the tool, click the Write or Flash button.

This is the universal engineering mode code for most Spreadtrum/Unisoc chipsets (SC7731, SC9832, SC9863, Tiger T-series, etc.).