Something not working? Start here.

The QR is too small or your camera can't focus.

1. Open the email on a second screen (laptop, tablet, another phone) — not the phone you want to install on.
2. Hold the camera 15–30 cm away.
3. Or use the manual install code in the same email: Settings → Cellular → Add eSIM → Use Activation Code.

1. Make sure you're physically in the destination country. Most plans only activate on a local network.
2. Settings → Cellular → check the Uonfly line is turned on and set as your data line.
3. Toggle airplane mode on and off.
4. Restart your phone.
5. Check Data Roaming is ON for the Uonfly line (yes, even though you're not roaming on your home plan — eSIMs use the same toggle).

WhatsApp and iMessage stay tied to your home number, which means they need your home SIM line to stay active for verification.

1. Settings → Cellular → make sure your home SIM line is still ON.
2. Set your home line as Default for iMessage.
3. Set Uonfly as Default for Cellular Data.
4. Turn Data Roaming OFF on the home line so it doesn't accidentally use carrier roaming.

1. Confirm you're in a country covered by your plan (check your order email).
2. Settings → Cellular → tap the Uonfly line → check Network Selection is set to Automatic.
3. Manually search for networks and pick one we support (listed in your order email).
4. Restart the phone.
5. If still nothing — email us with your phone model and the country you're in.

1. Run a speed test: speedtest.net or fast.com.
2. If under 5 Mbps in a city — likely you've hit a fair-use cap (only on Unlimited plans, resets at midnight local time).
3. If you're on a GB plan: check your remaining data inside your account.
4. Switch to airplane mode for 10 sec, then back on.
5. Try a different network manually: Settings → Cellular → Network Selection → Off (Manual) → pick a different carrier.

1. Settings → Personal Hotspot → make sure it's turned on for the Uonfly line (not your home line).
2. Set Maximize Compatibility to ON (iPhone) — old laptops can't see 5GHz hotspots.
3. Reset the hotspot password and reconnect.
4. Confirm tethering isn't blocked on your laptop's Wi-Fi settings.

Deleted eSIMs cannot be reinstalled with the same QR code — it's a one-time use.

1. Email hello@uonfly.com with your order number.
2. We'll re-issue a new QR code free of charge if the eSIM hadn't been used yet.
3. If data was already consumed, reinstall is at our discretion — we'll tell you within 1 reply.

1. eSIMs are tied to the device they were first installed on. They cannot be moved to a new phone after first activation.
2. If you haven't activated yet (still on airplane mode, never connected to a network) — email us, we'll re-issue.
3. If already active — you'll need a new plan for the new device. We can offer a goodwill discount on your next order, just ask.

1. 'Cellular plan cannot be added' → your phone is carrier-locked. Contact your carrier to unlock.
2. 'Invalid QR code' → the QR was already used once. Email us, we'll re-issue.
3. 'No internet connection' → you need Wi-Fi or another data source to install. The eSIM activation needs a network handshake.
4. Anything else — screenshot it and email support.