I have been having this issuue for severial weeks. Ive called verizon and I ve been into the store. I've tried everything removed simcard powered on off ect. 4G will come back after doing this but severial hours later it goes away and dosn't come back unless I power off. Any sugestions on what I can do. When I first got my phone back in January I had no problems 4G all the time except bad recption areas.