I switched from the apple 4s to the lg2 because I wanted better picture quality and a bigger phone. That is litterly all I got. I miss the reliability of apple. I am constantly resetting my clock and other features. What good is a smart phone if it cant even keep time.
I noticed that the clock on my phone was suddenly about 3 or 4 minutes slow. I found a preference that somehow must have deactivated itself, and since changing it, the time has been perfect. Go into Settings > System > Date & Time and make sure the top box (Automaic date & time) is enabled. For some reason, mine wasn't. Not sure if this is the same issue you're having, but it can't hurt to check.