Same Issue here on both Pixel 3 XL and IPhone X XL - LCP: timeout sending Configrzion Sup-Requests
I called Verizon Support and was escalated to Technical Support. They have no clue and no idea what a PPTP connection from a PC through the phone to your office.
I have Ubuntu running and can debug this which appears to indicate they are block this port. I can not use the HotSpot nor can I tether directly to my PC and establish a PPTP connection via wither of our phones.
Howere the VPN will establish on the phone itself but try using RDP on a Pixel, that will not float.
Verizon - You need to get your head out of the sand and fix this issue. I for one will teminate all phones I have with you iis this is not corrected.
Further - Get some people somewhere in the support channel that have some knowledge of networking and simple uses of your HotSpot.
You guys should be embarresed - garbgage Service.
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