Did not have a good 4G experience

[Andromeda#AC]

(I have a Samsung Epic 4g. This is my first android phone) I spent the day in Dallas, TX (4G area according to coverage map). My phone has never given me any problems in 3g or sprint network and everything has worked flawlessly. In Dallas it would find 4G but kept dropping the signal, my navigation wouldn't work with 4g on (worked perfect when I turned it off) and the phone kept freezing up. Like I said before on 3g the phone works perfectly with no issues. Is this common for 4g or is something wrong with my phone?

 

[azack]

4g is crap in Boise Idaho as well. My house is suppose to be covered but 4g is slower then 3g, if 4g will even stay connected it falls asleep and wont wake up have to manual reconnect. Only works out side too indoors and its weak. I called sprint they cant do much.