Hi Everyone, Sorry if this was addressed before but wasn't able to find anything after scouring the forums for the last couple of hours. I'm desperate at this point. I'm not able to make or receive calls or texts even though i have full bars/signal strength. I notice this most in certain areas in the city (San Francisco) but it seems like there is a 50/50 chance that I'll be able to make a call or send a text. Needless to say, this is extremely frustrating since I miss calls and texts. Data works perfectly fine, both 4g and 3g. The phone will say it's dialing and then the bars will go completely blank and then reappear. It will then say "Call origination attempt fails due to an immediate signal loss (signal fade or no service available)". I called Sprint and they checked all the towers. They said everything was fine. I can't imagine I'm the only one who has this problem, but it only started happening a few weeks ago. Please help me. I don't want to take it into Sprint just yet since all they'll do is hard reset or give me a refurbed phone. I'm trying to avoid that. Thanks.