Originally Posted by nskmda
I actually have exactly the same question.
I tried to ask LG/Samsung tech support, but either they really don't have a phone capable of that, or just don't know the answer.
I guess, it may be a matter of software supporting that as some phones (like LG G Flex 2) have radios capable of doing both.
But my feeling the 'stock rom' is only doing it in 'roaming' mode, when original provider can still get some money for the calls.
I like RingPlus and Truphone but I hate to carry 2 phones at the same time. This really sucks.
Anyone knows the answer to this thread's question?
From my experience, you can only switch between CDMA and GSM modes, so only one provider can be active at a given time. I'm using a SIM-modded Photon Q running CyanogenMod 12.1 on Ting CDMA with a FreedomPop data-only SIM card (using AT&T or T-Mobile signals) inserted. I occasionally switch to GSM to use free data on FreedomPop when traveling, at which point my CDMA phone number is essentially turned off until I switch back to CDMA mode.
My guess is that you'd need a phone with both CDMA and GSM radios that also has dual SIM card slots, which, at least in the U.S., would be difficult to find.