My 2 year old X23 doesn't connect through the usb port anymore. It will charge but doesn't recognise any other connection: no usb drive, no pc, no yubikey, etc. This is the case with both operating systems, Volla OS and Ubuntu Touch.
Has had anybody the same experience and/ or advice?

I fixed it. I simply resetted all the internet settings and all works fine now!

Since I updated my X23 to Volla OS 13.0 none of my VPN connections of different providers seems to be able to give through an active internet connection. Has anybody an idea what to do?