I am having problems getting a 4G signal at my house. I live in a larger city and close to the interstate. I shouldn't have an issue and the coverage map states that I should be getting it. I do get it sometimes but most times it is 3G. I am also having issues where my screen brightness is not at full brightness. Every no and again while I am looking at something on my phone it will get much brighter but after I turn the phone off and back on it is dimmer again. I keep my phone at full brightness all the time.