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

https://ericksuniquedigests.trexgame.net/why-did-phone-bill-deposits-feel-safer-than-cards-on-early-smartphones

UK players used to top up casino accounts through phone bill deposits, often facing limits around £30 per transaction and slower processing times. Today, Faster Payments and mobile wallets allow instant deposits from just £10