DataSIM is a travel eSIM service that gives you instant mobile data in 190+ countries — no physical SIM card, no roaming fees, no SIM swap. Buy a data plan in our app, scan the QR code, and connect within minutes. Available on iOS and Android.

An eSIM (embedded SIM) is a digital SIM card built into your phone. Instead of inserting a plastic SIM, you install a data plan electronically. Your regular SIM stays active for calls and texts, while DataSIM handles your mobile data abroad.

Most modern smartphones support eSIM, including iPhone XS and newer, Google Pixel 3 and newer, and Samsung Galaxy S20 and newer. Your phone must also be carrier-unlocked. To check compatibility, go to Settings → Cellular → Add eSIM (iPhone) or Settings → Connections → SIM Manager (Android).

Download the DataSIM app from the App Store or Google Play, choose your destination, select a data package, and complete checkout. Your eSIM is delivered instantly inside the app.

After purchase, open your eSIM details in the app and tap Install eSIM. Your phone will guide you through automatic setup. You can also scan the QR code manually in your phone's settings.

We recommend installing the eSIM before you travel while you have Wi-Fi. The plan only starts counting once you arrive at your destination and connect to a local network — so installing early doesn't waste data.

No. Your regular SIM stays in your phone for calls and texts. DataSIM works alongside it as a secondary data line. Just set DataSIM as your mobile data line in your phone's cellular settings.

Once you land:

1. Turn on your phone
2. Go to Settings → Cellular
3. Select DataSIM (eSIM Go) as your Cellular Data line
4. Turn on Data Roaming for the DataSIM (eSIM Go) line
5. Confirm your APN is set to esim.data

You should be online within 1–2 minutes.

Yes. Your primary SIM continues to handle calls and SMS on your usual number. DataSIM only provides mobile data, so there's no change to how friends and family reach you.

DataSIM is a data-only eSIM. For calls and texts, use apps like WhatsApp, FaceTime, iMessage, Telegram, or Viber over the DataSIM data connection — or keep your regular SIM active for traditional calls.

Regional and global plans automatically switch networks as you cross borders. Single-country plans only work in the country you selected — if you're traveling to multiple countries, choose a regional or global plan.

Plans start from $0.90/GB depending on the destination. Popular rates: Turkey $0.90/GB, USA $1.65/GB, France $0.9/GB, UK $1.10/GB, UAE $2.20/GB. Browse all destinations and rates inside the app.

Yes. If you run out of data or your plan expires, open the app and tap Top Up on your active eSIM. No need to install a new eSIM — your existing one keeps working.

Yes. Each plan has a validity period (e.g., 7 days, 15 days, 30 days) that starts the moment you connect to a network at your destination. Unused data does not roll over.

Refunds are available for unused eSIMs that have not been activated. Once an eSIM is installed and connected to a network, it cannot be refunded. For installation issues, contact our support team within 30 days of purchase.

Try these steps in order:

1. Confirm Data Roaming is ON for the DataSIM (eSIM Go) line
2. Check the APN is set to esim.data (username/password fields blank)
3. Toggle Airplane Mode on and off
4. Restart your phone
5. Make sure DataSIM (eSIM Go) is selected as your mobile data line

If you're still offline after these steps, contact support@data-sim.app with your eSIM ID.

Slow data is usually caused by network congestion or weak signal.
Try these steps in order:

Quick fixes:

• Switch between 4G and 5G in Settings → Cellular → Data Mode
• Move to a different location (away from buildings, underground, or remote areas)
• Restart your phone

Manual Network Selection
If automatic network selection picks a weak or congested carrier, you can switch manually:

1. Go to Settings → Cellular → DataSIM line → Network Selection
2. Disable Automatic Network Selection
3. Wait for the list of available networks to load
4. Select a different carrier from the list

Wait 1–2 minutes after switching for the new network to register

If the new network is also slow, repeat the process and try another carrier. Once you find a stable network, you can leave it on manual or re-enable Automatic.

Make sure your eSIM line is enabled in Cellular settings, Data Roaming is ON, and you've arrived at your destination country. The eSIM will not connect until you're physically in the destination country covered by your plan.

Open the DataSIM app and tap your active eSIM. You'll see remaining data, days left, and active plans in real time.

Yes. Most modern phones support up to 8 eSIMs (with 1–2 active at the same time). You can keep DataSIM eSIMs from previous trips installed and activate them again next time you travel — just buy a new data plan.
How do I contact DataSIM support? Our support team is available 24/7:

• Email: support@data-sim.app
• WhatsApp: +44 7414 231000