Press and hold the button. While holding it, connect the USB cable from the PC to the phone.

Most “repair IMEI Sony XZ3” cases are actually baseband mismatches. A clean flash of the original firmware often restores IMEI automatically.

Follow the on-screen prompts; you will need to power off your

send_data 0x00 0x00 0x00 0x0E 0x00 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x10 0x00 0x00 0x00 (Then your IMEI in reversed hex – requires conversion)

If official software repair fails, the issue may be in the protected NV (Non-Volatile) data or EFS partitions.

Before attempting any repair, you must prepare your device and computer. Repairing IMEI can result in data loss.

While holding the button, connect the phone to your PC via USB-C to enter Fastboot Mode .

If you have tried all the methods described above (particularly the stock firmware re-flash) and your IMEI remains invalid, it may be a hardware problem. This could be a faulty eMMC memory chip, a corrupted baseband flash storage, or a problem with the motherboard. In this scenario, your best recourse is to:

Repairing or changing an IMEI is often restricted or illegal in many regions, and as a result, there are no official "software-only" tools from Sony to do this .

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