A:Answer What I am hearing Nokia Mobile team saying is that this phone is mislabeled as a dual sim phone and that you have to physically change sims to use a second service.
I've done some more research. Only now are a few dual 4G LTE phones available on the market. I've found some indications that the 2018 Nokia 6.1 can receive a software update to allow it to operate in 4G on two services (sounds like it really is dual sim) if it has the right firmware. I could not find anything to indicate which 6.1 phones might have the right firmware. Apparently, the Nokia 7 is supposed to be dual 4G LTE. Look for terms like "dual stand-by" in the specification when shopping for your next phone. The phones are still not all-the-time 4G on both services (battery life concerns) but both access the 4G antenna at the same time in a stand-by manner. I'm interpreting this to mean that when you get a call (some of us still use phones for talking) on a line, that one becomes full-time 4G and the other drops to 3G or lower. I would also assume the same behavior for texting, data usage, and so forth. I'm just hoping that, by setting my one line to be my primary data line in 4G, a phone call/SMS/MMS/etc. on the other line will allow it to go 4G for that period of time.
Perhaps somebody should look at producing a dual 5G phone?
