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Loss of Connectivity - 2018 M3LR RWD (FSD 27.6/27.7)

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Since FSD beta 27.6 / 27.7, I have been having LTE issues in my 2018 M3LR RWD where it kicks in after 5 minutes of driving or have to reboot. Typically after it’s been in sleep for a few hours. Our 2022 MYLR AWD is on the same FSD version and doesn’t have this issue. Anyone else experiencing it? Tesla wants to charge me $240 to generally diagnose the issue.

This also means my ability to use the app is gone because of the loss in connectivity. Brutal as it starts to get cold to warm it up.