I have an LG g2 through Verizon.I'm using AT&T currently on this phone. Its already accepted my sim card and I'm able to call and text and I put in an APNthat I'm not really sure is correct but is giving me data. I live out in country and I used to get to bars on my HTC One but this phone gets maybe one bar sometimes and then it gets nothing. What do I need to do in order to get better service? Will unlocking it help, or putting in a different APN?