Top up any T-Mobile United States number from abroad. Enter the number, pick a plan, pay by card. Credit lands in minutes.
Enter a T-Mobile number above to see the live plans for that line.
A T-Mobile refill adds credit to an existing prepaid line, and you can do it from abroad in minutes. Enter the 10 digit US number, choose an amount and pay by card, Apple Pay or Google Pay. Airtime refills start and land on the line shortly after payment.
Last checked: September 2026
A T-Mobile refill from abroad works the same way as one made at home: you enter the prepaid number, pick an amount and pay by card, Apple Pay or Google Pay. The credit is delivered to the line in minutes. You do not need the phone in your hand, and the person using the line does not need to do anything.
T-Mobile is one of the main US carriers, and its prepaid lines are refilled with airtime credit. The number is what identifies the line, so as long as the line is active and the number is correct, the refill can be sent from any country.
Slashtel detects the operator from the number you enter, so you do not have to say which network the line belongs to. If the number is not a T-Mobile prepaid line, the order will not go through.
The refills on offer are airtime top-ups in several amounts. What lands on the phone is the amount shown at checkout, with no operator tax deducted from it. The credit can be used for whatever the prepaid line needs, such as a monthly plan, add-ons or pay-as-you-go usage.
Airtime refills are available at several levels, from a small top-up up to a larger one, so you can match the amount to what the line needs. Each one is a straight credit purchase rather than a bundle with a fixed validity period.
Because these refills are not taxed by the operator, the figure you see is the figure that reaches the balance. There is no separate deduction taken off afterwards.
US numbers have 10 digits, and you enter them without the country code. A number such as (201) 555-0123 is written as 201 555 0123. There is no leading zero to drop. One wrong digit sends the credit to a different line, so check the number before paying.
If you are given the number in international form, it starts with +1. The +1 is the country code for the United States, and it is not part of the 10 digit national number. Leave it out when you fill in the field.
Spaces, brackets and hyphens are only formatting. What matters is that the 10 digits are in the right order.
Most failed refills come down to a number that is not a prepaid T-Mobile line, a typo in the digits, or a payment that the bank declined. Check the number first, then try the payment again. If the line has been inactive for a long time, the refill may not be accepted until the line is restored.
A declined card is common when a bank sees a payment to a foreign merchant. Trying a different payment method, such as Apple Pay or Google Pay, often clears it.
If the payment went through but the credit has not appeared, allow a little time for the operator to process it. Keep the confirmation you receive, since it carries the details needed to trace the order.
Payment is made by card, Apple Pay or Google Pay, and the refill is sent to the number once the payment is confirmed. No account with the operator is needed, and no personal details of the person using the line are required beyond the number itself.
Paying by card, Apple Pay or Google Pay keeps the transaction inside a normal checkout flow. You see the amount before you confirm, and you get a confirmation afterwards.
Only the number and the payment details are needed. That makes a refill a practical way to keep a family member's US prepaid line running while you are overseas, without sharing bank details or asking them to buy credit themselves.
Checked against T-Mobile's official site on 21 September 2026.
Enter the 10 digit US number, choose an airtime amount and pay by card, Apple Pay or Google Pay. The operator is detected from the number, and the credit is delivered to the line in minutes. You do not need the phone or an account with the operator.
Airtime refills start. Several amounts are offered, so you can pick the one that matches what the line needs. The amount shown at checkout is the amount that lands on the phone, with no operator tax taken off it.
No. US numbers have 10 digits and you enter them without the country code. A number such as (201) 555-0123 is written as 201 555 0123. There is no leading zero to drop, and the +1 is left out.
No. A refill adds credit or a plan to an existing prepaid line only. It does not work on postpaid or contract accounts, which are paid through the account holder's bill instead.
Check that the 10 digits are correct and that the line is an active prepaid T-Mobile number. If the payment was declined, try another method such as Apple Pay or Google Pay. Keep the confirmation so the order can be traced if needed.
Dial #BAL# (#225#) free from the T-Mobile phone to see the account balance and plan information.
Plans renew automatically at the 30-day mark if the balance covers them. T-Mobile says that if the balance is not enough to renew all lines for 120 days, all lines are suspended for 30 days.
Dial 611 from a T-Mobile phone, or call 1-800-937-8997.
Enter it with the country code +1. A number written locally as (201) 555-0123 becomes +1 201 555 0123. US 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 States.
Plans currently start from $8.59 and go up to $178.42, including our service fee. The exact price is shown before you pay, with no extra charges at checkout.
Yes. Slashtel tops up any prepaid T-Mobile number in United States, 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.