I'm pretty sure some other faced the same issue like me, unless they brought their own devices on XM.
I have a Samsung Galaxy Note 9 bought from XM and fully paid off after few months installments and I got it unlocked. Now, when I'm trying to use that phone on Verizon network their website is showing the device is not compatible on our network which technically XM uses.
I already spoke to XM reps and they said everything is good from their side, but Verizon has some issues or not verifying currectly.
Before purchasing the phone and after I paid off the device I was clearly told that the phone will work on any network once it is unlocked. Certainly there is a false advertisement there. Even if I come back to XM later, I will never buy their phone ever.
I had a chat with VZW too and they confirmed that my phone is not compatible.
Did anyone have same issue before and resolved the issue? Please help me