MarkAce
I just visited a fintech conference in the UK, where I saw this neat solution for managing blocked countries. Basically it used the geolocation of the phone to determine where you are and automatically block all the other countries. So when I am in the Netherlands, transactions outside of the Netherlands are automatically blocked. But today, I am in the UK, and my phone knows this, so automatically, the UK is allowed, but all other countries are blocked.
This could be a safe and convenient solution to manage geoblocking.