Cellular Network Setting Won't allow to select preferred network type to LTE Android is not letting me select preferred network type to LTE for my 4G SIM, because I have selected the other SIM for data. The thing is, it only lets you select LTE as preferred network for a SIM which is selected as your DATA SIM. 

The problem is the 4G SIM that I have, doesn't work on any network other than LTE. So if I am using data from my other SIM (3G), the network for my 4G SIM is gone. 

Is there a way around it?
In any 4G enabled dual SIM handset, only one slot is meant to support LTE, that is SLOT 1. 

Insert your 4G SIM in SLOT 1 and 3G SIM in SLOT 2.