My iPhone has just started having problems with receiving calls from any phone. I have not changed any settings in my phone to cause this problem, people will call me, it may ring once or twice on their end of the call but then it will either say it's busy or go straight to my voice mail, I do not receive anything on my phone indicating that someone has called me. I tried the entire list of things Apple has listed in their help page for this issue and nothing seems to work. Now and then a call will make it through but most times it will not. I have not dropped my phone or damaged it in any way, IIm not in a area of bad connection, I frequently talk on my phone and have never experienced this issue before. I've tried taking out the SIM card and resetting the network settings, I've checked the do not disturb option, I have not yet reset my phone as I do not want to go through that hassle. If anyone has had this same problem, please help.