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

https://touch-wiki.win/index.php/Do_Casinos_Ever_Charge_a_Percentage_Fee_on_Withdrawals_in_the_UK%3F

UK players used to top up casino accounts using phone bill deposits, often capped at around £30 per transaction. Now, Faster Payments and mobile options let them deposit amounts as low as £10 instantly