I am going on 1 month without LTE. Mobile tech came out and could not fix it. It lost connectivity after the last software update to 2022.36.20. They are having to order new parts and are hard to get apparently b/c they won't get them until Jan 10th (already pushed once). They ordered the parts on December 14th.
Without LTE, navigation does now work. Without navigation, FSD does not work. The only music you can listen to is the radio or via Bluetooth. Obviously no other stream services will work.
Why not connect your car to your mobile phone via Wifi to get around this issue? Guess what, Wifi disabled when in motion (new one to me). Assuming it's this way to they can sell their 'Premium Connectivity' plan...