Here is my experience with the 4G adapter. Everything works but the remote commands from the Uconnect app, other than the features that were dropped when 3G went away that is. I have been dealing with Uconnect customer support for months trying to get the adapter to update. After 20+ tries at the update, leaving it unplugged for 48 hours, driving the 5 trips of 15 minutes each, it still won’t update. Currently they claim they are trying to get the manufacturer (T-Mobile) to replace it and that has been going on for the last two weeks.
I have to add that the Uconnect customer service is each among the worst, if not THE worst, I have ever dealt with. There is no level above a second tier representative that we can talk to and they don’t talk direct to the technical people or T-Mobile. It isn’t a surprise that nothing gets done with a system as poorly set up as theirs. Ok, done with my rant.
Update as of today. Now everything that is supposed to work, works. My adapter “magically” updated itself the day after I talked to Uconnect customer service. That was on Friday 4/6/22 and at that point I threatened to cancel my Uconnect, file a complaint with the BBB, and report their poor customer service / business practice to the state’s attorney general. Just like that my issues are resolved - imagine that!