I just opened Revolut and ordered a physical card.
By adding "a friend" they mean adding one of your contacts from the phone.
Their app is very advanced with a lot of functions - one potential benefit i see is that you can receive BTC from a casino and simply use a physical card to spend these funds.
In other words, you don't have to sell your crypto winnings to convert them into GBP and then send them to your UK bank account as you would on exchanges like Coinbase.
Here everything is interconnected.
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Their physical card comes with a sort code and account number just like a regular bank card.
There are some fees for this convenience as well but not this crazy as on Coinbase, as far as I can see.
And they also have a virtual one which i could right now connect to Google Pay and use in Tesco, etc if i wanted to.
I guess my card should arrive soon; the app has a card tracker, and then i'll see whether all is as good as it seems now.