I want to downgrade for several reasons, the first one being that I was using FoxFi for the wifi hotspot mode so my family could get online and surf the web, then one day my phone decided that it wanted to be on KitKat and I couldn't stop it. Once that happened I noticed I could no longer use Wifi Hotspot mode, which was a bummer, but I just started placing my unlimited data sim card into the SCH-LC11 Jetpack we no longer used and I was back in business with the hotspot when I needed it even with the hassle of switching out the sim card. Eventually my sim card kinda got worn out and stopped working so I had to get it replaced, now if I place the new sim card in the Jetpack it no longer works and I have no idea why it doesn't since it works fine in my phone.
So now I want to downgrade to have the wifi hotspot mode back, and because my phone seems to be slower and just all around sluggish with this KitKat update.
I'm not sure where to begin though, what do I need to do to unlock the bootloader? Will unlocking it erase everything on the phone? How do I downgrade to JB in the easiest, noob friendly way possible? Can I get rid of the OTA pop up that constantly tries to update to KitKat after I downgrade? I just don't want any surprises before attempting something that might make my phone a brick.
Sorry for the wall of text. D: