ok well this is my topic on verizons site. problems with phone moving back to 1x a lot of the time - Verizon Wireless Community
well my problem was dropping back to 1x and not being able to hold a solid 4g/3g connection.
well it was suggested to go into the Wireless Settings/Mobile Network menu and uncheck the Data Roaming box and change the Select System from Automatic to Home Only. After you do that, turn the phone off and back on.
i did that today and i got substantially better coverage. i held onto my 4G and i didnt go into 1x until i got into the VZw "deadzones". it was out in the woods on my dirtbike so i expected that.
anyway, switch yours and then try it out for a day! i hope today wasnt just my lucky day on the network lol... hopefully this is a fix.