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Forcing one SIM of Lumia 630 to use 3G-only


WPCentral Question

Hey there! I was wondering if it's possible to force one SIM of my Lumia 630 to use 3G only if it's possible. My problem concerns situations when there are both 2G and 3G connections available and 3G signal is not so strong while 2G is much stronger, so phone prefers taking 2G signal, which means not been able to use internet at all. It also takes battery life when the phone is constantly switcing between 2G and 3G. I experience this issue a lot on some areas I visit a lot. For instance there are several places where there are these 2G amplifier towers nearby, which leads to no 3G-connection. This is annoying problem and I would like to solve it.


New member
Dec 23, 2012
There's the long and short of it.

The short version is that it can't.

The long version is that there used to be a tool to do so, but it was removed in the Black Update.


New member
Jul 10, 2012
##3282#check if it works for you.. It's called field test mode and it's not removed with the Black firmware.. Not on all ROMs or phones