I'm new in the Android world and bought an LG G2 back in november.
I had originally intended to custom install cyanogenmod or KitKat 4.4 to replace stock rom, but I couldn't find a way to install a custom recovery, and was only able to root my device via Kingo Android Root.
A while later I saw an update that popped up, and not knowing any better I clicked install. It was about 114MB. That was about 3 days ago, and my LG G2 has been stuck in a bootloop ever since.
When I try to turn it on the LG logo shows up, then it says "secure booting error"and "Cause: boot certification verify" on the top left corner of the screen in white text.
I tried doing a hard reset, but that didn't work. I don't have a custom recovery so that I can clear the cache and data or something. So pretty much I have a bootlooped phone with no custom recovery, I can't do a hard reset, and it's Sprint and everything's new so it's harder to find a fix.
Does anyone here know of a way I can fix this? It would be much appreciated.
Thanks in advance