Top up any Three United Kingdom number from abroad. Enter the number, pick a plan, pay by card. Credit lands in minutes.
Enter a Three number above to see the live plans for that line.
Checked against Three's official site on 21 September 2026.
Use it for at least one chargeable activity every 180 days, such as a call, a text, data on Three's network, or using existing credit or a Data Pack.
Call 444 free from the Three phone, or use the Three app or My3.
Enter it with the country code +44. A number written locally as 07400 123456 becomes +44 7400 123456, so drop the leading 0 after the country code. UK mobile numbers have 10 digits after the country code. The example is a format guide, not a real number.
Enter the number with the country code, pick a plan and pay by card. The operator is detected automatically and the credit goes straight to the phone. You do not need an account or a bank account in United Kingdom.
Plans currently start from $9.34 and go up to $88.10, including our service fee. The exact price is shown before you pay, with no extra charges at checkout.
Yes. Slashtel tops up any prepaid Three number in United Kingdom, your own or a family member's. You only need the number; the person does not need an account.
Recharges are delivered instantly and cannot be reversed once they reach a valid number, so check the number before you pay. If the operator rejects the number, Slashtel resends or refunds you in full.
Prices on this page are in US dollars and include the Slashtel service fee. At checkout your card may be shown and charged in your local currency, and the exact amount is confirmed before you pay.
Yes. Payments are processed by Stripe with 3D Secure where your bank supports it, and Slashtel never sees or stores your full card details.
Most recharges arrive within a few minutes. If the phone is switched off, the credit lands when it next connects. You get a confirmation email with your order reference.
If the operator rejects the recharge, we resend it. If it still can't be delivered, write to esim@slashtel.com or message us on WhatsApp with your order reference and we'll sort it out.