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Lost internet connectivity after update

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Not sure if it will help, I connected my cell phone hotspot to the X. Once the X connected, WiFi symbol showed up. I then turned off my cell’s mobile hotspot and viola LTE was back. This is very frustrating to lose LTE...like a dumb a$& left without my key, used my phone as key. Got to my stop and when I returned to car I couldn’t unlock my car because it wouldn’t connect to app, x had no cell service. Had to have a neighbor bring physical key, last time I rely on my phone only.
 
made a visit to service centre, car has been in for 2 days, they did a manual reset of the Communicationmodule and re-installed software update, now everything works fine. No further information was provided.
The oly info I got is that the software update blocked during update at communications module. Maybe because at time of update, the car had no WIFI signal in range and was in bad 3G cover zone