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Here is a proper text outlining the details and context:

Click Write or Start . The tool should display a green PASS message when finished.

Tap on "Phone 1" (for SIM slot 1) or "Phone 2" (for SIM slot 2).

| Chipset | Dialer Code for IMEI Write | PC Tool Required | Difficulty | | :--- | :--- | :--- | :--- | | | ❌ No (display only) | ✅ Miracle Box / ResearchDownload | High | | MediaTek | ✅ *#*#3646633#*#* (Connectivity → CDS Information → Radio Information) | SN Writer | Low-Medium | | Qualcomm | ❌ No | QPST / QXDM | Medium | | HiSilicon | ❌ No | HCU / IDT | High |

Here is a technical guide regarding IMEI repair on devices running on Spreadtrum (SPD) chipsets.