My MCU failed on my 2015 Model S ---- of course just a couple of months after warrantee expired. The MCU was replaced and my 3G antennae was “upgraded” to LTE by ther service center in Seattle. At first the browser did not work. After first saying there was nothing wrong and they offered to put a 3G antenna back. Their reasoning is I might be in an area with weak LTE signal. Really? In an densely populated IT heavy city? When I declined, all of a sudden, they determined LTE board was defective. I got the car back. Since then browser gets stuck going for tesla.com à Model S. There have never been more than two bars on the signal strength. In addition to the LTE weakness the wifi signal in my house is also weak. Car is 20 feet under the access point in the garage and never had issues with original MCU. They are now basically telling me that the tesla.com website is data and processing intensive. I have a hard time believe this. If we can’t get to a site like tesla.com why have a browser at all? I am not an IT person but would appreciate thoughts and any suggestions on how to push back.