Pay for an eSIM straight from your crypto exchange

Every invoice names a coin and a network, and the withdrawal has to leave your exchange on that same network. The same token on a different chain is a different payment: it does not reach the invoice, so the order cannot complete itself. USDT is where this bites, because checkout offers it on three chains.

Exchanges label networks in different ways. TRC20 is the TRON network, BEP20 is BNB Chain, ERC20 is Ethereum. If your withdrawal screen lists chain names instead of standards, match them using this list. The checkout currently offers twelve coin and network pairs: USDT on TRC20 (TRON), USDT on BEP20 (BNB Chain), USDT on ERC20 (Ethereum), USDC on ERC20 (Ethereum), ETH on Ethereum, BTC on Bitcoin, SOL on Solana, TRX on TRC20 (TRON), BNB on BEP20 (BNB Chain), LTC on Litecoin, DOGE on Dogecoin and XMR on Monero.

If the invoice says one network and your exchange does not offer that network for the coin, do not substitute another. Pick a different coin at checkout, or withdraw to a wallet you control first.

Exchanges usually take a withdrawal fee out of what you send. If you ask for exactly the invoice amount and the fee comes out of it, the invoice receives less than it asked for and shows as a partial payment. The number that counts is the amount that arrives, not the amount you typed.

On the withdrawal screen, find the line that shows what you will receive after the fee and make that figure equal the invoice amount. In practice that means entering a little more than the invoice, by the size of the fee. Read the received amount before you confirm, because the wording on fee-inclusive and fee-exclusive options is easy to misread.

An order has a payment window, shown as a countdown on the order page and currently 30 minutes. That is comfortable for a transfer from a wallet on a fast network. It is tighter for an exchange withdrawal, because the exchange may add a confirmation email, a security check or a manual review before the coins leave, and you usually cannot tell in advance whether yours will.

Our own measurements point the same way: Bitcoin buyers took around eleven minutes to send after opening the invoice, longer than on any other coin, which is what moving funds off an exchange looks like compared with sending from a wallet. The measured times by coin are on /crypto-payment-times/.

So check your exchange's withdrawal status and limits before you open the order, not after. If you are not sure it will release the transfer quickly, withdraw to a wallet you control first, wait for it to land, then pay the order from that wallet. It costs one extra transfer and takes the exchange's timing out of the part that has a clock on it.

Paid less than the invoice: send only the difference to the same address. The order page shows the amount still to send, the order completes automatically once it arrives, and the window reopens for it. Do not send the full amount again, because that would be a second payment on top of the first.

Paid after the window closed: late payments are never delivered automatically, on purpose, because the rate the invoice was built on may no longer hold. The money is not lost. Contact support with the order code and the transaction hash from your exchange's withdrawal history, and the order is settled by hand.

Paid on the wrong network: the payment never reaches the invoice, so the order cannot fulfil itself. The funds are not necessarily lost, but recovering them is manual, and we cannot promise an outcome in advance. Send the order code and the transaction hash to support instead of paying again.

Order still says waiting: first check the exchange's withdrawal history. If there is no transaction hash yet, the exchange has not released the transfer. If there is one, confirm the network matched the invoice. Bitcoin and Monero confirmations also take longer than the fast chains, and nothing is stuck during that time. Leave the order page open and do not send a second transfer.

If the exchange asks for a memo or tag, copy exactly what the order page shows. If the order page shows none, leave the field empty, and if the exchange insists on one for your coin, choose a different coin or withdraw to a wallet you control first.

The same checklist applies whatever is in the cart: the UK number, travel data eSIMs or VPN access. Delivery starts when the payment confirms, with no approval step. For a UK number, check that your phone supports eSIM before paying, because the QR is single use: it installs once, is never reissued, and UK number orders are not refunded. Travel data eSIMs differ and can be reissued. Turn VPN, iCloud Private Relay and Private DNS off while installing.

The UK line receives SMS and calls. It does not include mobile data, outgoing calls or outgoing SMS. Incoming SMS and calls work in most countries through UK carrier roaming, not everywhere: buyer reports mark Russia, Hong Kong and China as patchy, and the full list is at /uk-esim-coverage/. Standard SMS verification works, but no provider can promise that a given service accepts a given number.