My LTE connection constantly goes in and out. I have Verizon as a cell provider where I have LTE all throughout Boston with hardly any dead spots where it seems like my Model 3 is RARELY connected to any network which means I can almost never check the status of the charge or remote control it. I believe Tesla's LTE service provider is not Verizon, so it's possible that's just the connection here in Boston (and out west towards Framingham) - any other people live in the greater Boston area exhibiting the same behavior?