I have installed cyanogen-mod 13 as custom Rom in my android phone. Now, I found a problem in network connectivity. While connecting data(3G), after sometimes, 3G data automatically shifting to 2G data. I have set APN settings based on service provider(automatically set).
Open dialer, and type
It will enter into
Inside that, tap on Phone Information, look for
Set preferred network type, and set it as
Setting will be lost after a reboot.