So my phone the LG Phoenix 2 (Model: K371) Has been stuck on a boot loop for a while now and it boots, says "security error" and reboots. I tried factory resetting it 3 times from the menu and it is still happening. Any suggestions please?
You should try looking for the method (on lg phones) to reflash the OEM software. If that doesn't work, then a service call would be in order, I think.