UK players have moved from phone bill deposits, which often had limits like £30...
https://source-wiki.win/index.php/What_Should_I_Look_for_If_I_Care_Most_About_Speed_on_Mobile%3F
UK players have moved from phone bill deposits, which often had limits like £30 per transaction, to Faster Payments and mobile wallets. These newer methods let you deposit as little as £10 quickly and securely, without waiting on phone carriers