Any help on this would be greatly appreciated. I haven't had any success talking with Sprint or Samsung reps. I have wifi hotspot enabled from Sprint, and I have a 4g signal. I can connect and use the wifi hotspot with no problem, but when I make or receive a call, my 4g automatically disconnects. Basically, I can't use the wifi hotspot and the phone at the same time. I've tested this on the EVO, and it was able to use wifi hotspot over 4g and make calls with no disruption. Is this just not possible with the Epic? Or is there a quick fix? Thanks.