I'm not sure if this was included in the LOS issues people were having. I lose my 3g connection periodically. Not the signal but the actual option for 3g data becomes unchecked and I have to go back in and recheck it. This can be anytime whether I am using only 3g or I may be coming out of wifi or I may be switching out of 4g. So basically it can happen at anytime. It's annoying. I have received the android update and the problem occurred pre and post update. My phone is not rooted.

 

I use Battery Defender, but I'm pretty sure it would happen prior to installing that app.

 

It was Battery Defender. It's too bad because I noticed a measurable improvement in overall battery life using it. Having to constantly go in and turn my 3g back on manually after the phone wakes up is just unacceptable. I've seen a couple other users state the same issue in reviews of the app. Maybe it will get fixed in the next update.