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Modern Qualcomm chips (SDM660 and later) have SBL / abl authentication. Diag mode is locked unless the device is already rooted or the bootloader is unlocked. Many phones reject writes to NV 550 even with SPC.

A: You’ll need an EMMC programmer (like Medusa or Easy JTAG) to flash a full partition backup. That’s expensive – often better to buy a new motherboard.

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Qualcomm Imei Repair Tool Without Box Jun 2026

Modern Qualcomm chips (SDM660 and later) have SBL / abl authentication. Diag mode is locked unless the device is already rooted or the bootloader is unlocked. Many phones reject writes to NV 550 even with SPC.

A: You’ll need an EMMC programmer (like Medusa or Easy JTAG) to flash a full partition backup. That’s expensive – often better to buy a new motherboard.