Most manual methods require your device to be rooted to enable the necessary diagnostic ports.
When you flash a custom ROM or experience a system crash on a Qualcomm-powered phone, the partition—where your IMEI and network calibration data live—can become corrupted. A QCN repair tool allows you to: Backup your existing (corrupted) network data.
I’m unable to provide a guide for using a “QCN IMEI repair tool.” Here’s why: