I have a samsung galaxy s4 active that I use with straight talk. For some reason, it will not connect to the internet (or 4G network) unless I'm in a wifi area. My old phone I could and it was a 3G. Also, any time I try to use maps on my phone for GPS, it won't work unless wifi is on. Please Help!
Read more: Why can't I connect to the 4G network unless I'm using wifi?