The phone will have full signal and then no signal for twenty to thirty minutes at a time. The phone will start to heat up and at the time the battery will only last two hours tops. I have reset the phone like they told me to. I have taken out the sim card and the memory card like they told me to. I have taken off all of my apps and put them back on one by one. I have had this phone of a while now and no one is willing to help me out. I have a year warranty and they just keep giving me the run around.