How to select the 3G I am using Moto E with Lollipop 5.1 And I am having this trouble that whenever I am using 3G service, it automatically switches to 2G and i can't able to select 3G (3G selection is not available/showing). How to select the 3G.
Go to Settings>Mobile Network>Network Mode there will be three modes for you GSM only, WCDM only and both. Just select WCDM only option and then you can use 3G.