If anyone wants to do this,
Press Settings>More Settings>Mobile Network>Access Point Names> then tap the carrier you're using.
go down to APN protocol and put the dot in whatever you want to use. back out and you're done.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?