The quickest way to reach us is by email at hello@one-sim.io. Our support team handles questions about orders, installation, coverage and anything else eSIM-related, and replies by email.
Many questions are answered in our Help Center, which covers buying, installing and using your eSIM, along with account and refund questions. It is worth a quick look first, since you may find the answer without waiting for a reply.
You can also check your order, remaining data and any past purchases directly in your customer dashboard. This is often the fastest way to confirm whether your eSIM has arrived or how much data you have left.
To help us sort out your query as quickly as possible, please include as much of the following as you can:
The more detail you give us up front, the fewer back-and-forth emails we need to sort things out. We read every message and will get back to you as soon as we can.
Prefer a form? Fill this in and it reaches the same support inbox. Please include your order number and device model if you have them.
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