This has been a problem for almost a year. I've visited multiple Verizon stores and asked numerous techs for help and no one can figure this out. Many of them have tried changing settings but it keeps happening. When I go to download my email (Verizon Yahoo email), very often it will try to update for a second or two and then say "server unavailable, try later". This happens at home on my wireless network and on the 4G network out in the world. It does not seem to make a difference where I am. This was not the case originally with the phone which I have had for 1 1/2 years. Any suggestions?