My father doesn't have android he uses old nokia (old habits) but he knows computer at level 3 basic something like.
We used a remote computer VPS in frankfurt to do the kraken account signup and verification's.
Can we open coinbase the same way via windows VPS in frankfurt or i can do it via my android phone? but it's his sim card (phone number that is linked to his ebanking) it's on his nokia. Do I need some verifications if I install coinbase in my android phone with sms like whatsapp that I have to have his sim inserted (phone number) ?
I really don't want to check the signup and have troubles in the end with the refund solution

I hope you can understand me.
Luno, Kriptomat, coinbase, switchere
Of that selection I'm only familiar with Coinbase. I've genuinely never heard of any of the others.
With Coinbase all I had to do to verify was photo ID and proof of address. Nothing else. They gave me a stupidly high limit but I can't remember what it was. Use a phone to photograph and upload through their app. The website didn't work for me. Coinbase Pro will have lower fees but requires separate registration but the same docs when I checked.
Id and address is all I required for Kraken level 3 as well but it was many years ago. Maybe it's changed.