UK players used to top up casino accounts via phone bill deposits, often capped...

https://planetfitnessprices.com/how-mobile-casino-deposits-have-evolved-from-phone-bills-to-instant-transfers/

UK players used to top up casino accounts via phone bill deposits, often capped at £30 per transaction. Now, Faster Payments and mobile wallets let users deposit as little as £10 quickly and securely