Sorry if this is a duplicate, but I don't see my first post. I'm looking for a list of carriers in the US who will support the FLX1s. Any recommendations?
Mint (NVMO of Tmobile) works well with calls and SMS. MMS not (there should be an old post referring to that). From my experience, only 4G works - not 5G. One grain of salt however, data work only over wifi, not via cellular data. Change of the APN settings did not fix that problem. Out of curiosity I inserted a Purism Awesim SIM card (uses ATT network) into the FLX1 - it could not find any network.
One problem in the US appears to be not only tne different bands for cell service but that most carriers only accept "whitelisted" phones on their service.
@flx1stl I got Ultra (another T-Mobile NVMO) working on 4G with Calls, SMS and 4G Data (but not 5G yet and MMS untested). I did this by changing the APN to fast.t-mobile.com instead of ultra's recommended 'wholesale'. I've noticed APN changes make the mobile data shut down and restart but seems like a reboot of the phone has more of an effect.