I'd prefer Mastercard.
What should I do if my phone is lost or stolen? Why is my balance not updated after a bank transfer? Which countries are supported? Why is my virtual card not working? Why is my card payment pending? Which cards and currencies are supported? Why is the exchange rate wrong for my card payment? Why is my top-up pending? How do I verify my identity? Why is there an extra charge on my statement? What is automatic top-up? What are the top-up limits? What should I do if I forgot my passcode? Why was a fee charged for my card payment? Which fiat currencies are supported? How do I verify the source of my funds? What is the charge for topping up by card? What is the charge for currency exchange? Why did I receive the wrong amount of cash? What is the charge for cash withdrawal? Why is my card payment not recognised? Why was my cash withdrawal declined? How can I get a disposable virtual card? How do I request a refund? Why was my transaction charged twice? Why do I need to verify my identity? Why was my top-up reverted? Why is my balance not updated after a cheque or cash deposit? How do I link my card? Why is my PIN blocked?