We have the same Website, Email, Bank and PayPal accounts. We still communicate the same way, mostly be Email.
The only real change is our mobile number is not valid, but we have removed that from the website contact info anyway. I do have a land line phone but don't put that on the website any more.
I will need a new SIM card and that will result in a new mobile number, but really, Facebook Messenger, Line and Skype all work as well and that is all still running the same.
We can be contacted at ArtAndTechnology.