USDT mobile top-up — pay prepaid phones with Tether
Send mobile airtime to any prepaid phone in 150+ countries and pay in Tether. FillUpCoin accepts USDT on TRC-20 (Tron) and ERC-20 (Ethereum), quotes a 1:1 price with no exchange-rate exposure, and delivers the top-up to the carrier in minutes.
Why USDT is the easiest way to pay for airtime
Stable price. The invoice is quoted in USDT so you don't need to worry about Bitcoin or Ethereum moving while you send the payment. 20 USDT is 20 USDT, period.
Dirt-cheap fees. USDT on Tron (TRC-20) typically costs under a dollar in network fees — perfect for a $10 top-up where a Bitcoin fee would eat the margin.
Fast settlement. TRC-20 confirms in about a minute. ERC-20 depends on gas but is usually a few minutes.
Universally held. USDT is the single biggest stablecoin in crypto, available on every exchange and most wallets. If you have any crypto at all, you probably have USDT.
TRC-20 vs ERC-20 — which should you use?
TRC-20 is the right choice almost every time. Fees under a dollar, confirmation in a minute, support on every major wallet and exchange.
ERC-20 makes sense if your USDT is already sitting on Ethereum and you don't want to pay for a bridge. Note: ERC-20 fees scale with Ethereum gas — a small top-up can cost $5-20 in gas alone.
At checkout we show the address for the network you selected. Important: send USDT only on the network shown. Sending USDT TRC-20 to an ERC-20 address (or vice versa) is lost permanently.
Which carriers accept USDT top-ups?
Any carrier in our catalogue — 600+ operators across 150+ countries. Verizon, T-Mobile, AT&T, Vodafone (UK/DE/IT/ES/EG), Jio, Airtel, MTN Nigeria, Safaricom, Vivo, Claro, Telcel and all the European prepaid brands (Lebara, Lycamobile, giffgaff, ALDI TALK).
For digital-only brands (Lebara PIN, Vodafone PIN, T-Mobile PIN) the voucher code is delivered to your email. For direct top-ups the airtime is credited to the number immediately after payment confirms.
Top operators you can top up right now
Browse by country
FAQ
Do you support USDT on Solana or BSC?
Not currently. We support TRC-20 (Tron) and ERC-20 (Ethereum). If you hold USDT on another chain, bridge to Tron for the cheapest route.
Is the price the same across networks?
Yes — the invoice amount in USDT is the same whether you pay TRC-20 or ERC-20. Only the network fee differs.
What's the smallest top-up I can send with USDT?
Most carriers start at the equivalent of $5–$10. Minimum depends on the carrier — it's shown on the operator's page before you pay.
Will my USDT be refunded if the top-up fails?
Yes. Failed deliveries are refunded in USDT on the same network you paid from, within 24 hours. We absorb the refund network fee.