Get a new phone. Once the salt gets in , even if you clean it and get it working again , it will keep having problems periodically. I have Verizon and used to have issues in western So Co . things may have improved since then.
verizon. I have had them forever and travel all over the Country. Absolutely the best. I also have perfect coverage everywhere on Narragansett Bay all the way to Anawan and NR.