Fixing “this phone is permanently locked…” on LG V60

There are several issues that might arise after cross-flashing your LG device. One of them is this phone is permanently locked and can not be unlocked like on the LG V60. This tends to happen when cross-flashing tampers with the EFS partition (like when attempting a network unlock) . Some cross-flashes or downgrades might even result in the device getting stuck at EDL (qhsusb_bulk or qualcomm hs-usb qdloader 9008)

In this guide, I’ll be using the LG V60 T-mobile (LMV600TM) as an example. You’ll have to get relevant files for your model if different.

Backup First

First off, you need to backup your device’s current firmware (at least modem_a, modem_b, FSC, FSG, modemst1 & modemst2). A backup is always a good idea regardless of the condition of the device because you never know what part of your backup might come in handy.

If you can’t get a box or dongle which supports your model then consider using QFIL to dump each partition.

Flash A Dump From A Working Phone

For the LG V60, download this firmware dump and this firehose then flash using QFIL. If you encounter Sahara Fail error then try these fixes.

After flashing, flash these LG V60 fsg, fsc, modem and modemst files to their respective partition using this QFIL guide.

IMPL 0

At this point, you should be able to write IMEI via the LG hidden menu, Navigate to SVC Menu > MID Info and you can re-write your IMEI and Serial Number (CSN). You can also write your NT Code if you have an NT Code warning on boot.