Two eSIMs. One Seamless Experience.
If your plan includes a Global eSIM (like Globetrotter, Aero, Forces, RailReach, or Sail), your phone actually runs two SIMs side by side — your UK SIM/eSIM and your Global eSIM.
They work together automatically to give you the best signal, the right data connection, and clear, predictable roaming wherever you go.
💡 Quick Overview
eSIM Type | Used For | Works In | Includes |
UK SIM / eSIM | Calls, texts & local UK/EU data | Zones 1 – 4 | Unlimited calls & texts in Zones 1 – 4 |
Global eSIM | Data roaming in 205 destinations | Zones 1 – 6 | Global data (no overage or day passes) |
💬 Your UK SIM handles calls and texts while the Global eSIM handles data worldwide.
🌐 Example: Travelling from London → France → Singapore
🏠 In London (Zone 1 – UK)
You’re using your UK eSIM for calls, texts, and data (EE network).
The Global eSIM is idle in the background.
🇫🇷 In France (Zone 1 – EU/EEA)
Your UK eSIM continues to work exactly as at home.
Calls, texts, and data are all included — no extra charges.
🌴 In Singapore (Zone 3 – Extended Travel)
Your UK SIM still handles calls & texts (unlimited).
Your Global eSIM activates for data automatically.
UK eSIM data roaming is disabled outside Zone 2 to prevent double charges.
💬 You keep your UK number for calls while data routes through the Global eSIM.
✈️ Back in the UK
The phone automatically switches back to your UK SIM for everything.
The Global eSIM pauses until your next trip.
⚙️ Recommended Settings
✅ Enable Mobile Data Switching
iPhone: Settings → Mobile Data → Mobile Data Switching → ON
Android: Settings → Network & Internet → SIMs → Allow Mobile Data Switching → ON
💡 This lets your phone automatically choose between your UK SIM and Global eSIM for the best data connection.
🚫 UK eSIM Data Roaming Disabled (outside Zone 2)
On plans with a Global eSIM (Globetrotter, Aero, Forces, RailReach, Sail):
UK eSIM data roaming is automatically disabled outside Zone 2 to prevent high-cost usage.
Beyond Zone 2, the Global eSIM handles all data automatically.
You can still make and receive calls and texts in Zones 1 – 4 using your UK number.
🔋 What Happens in Each Zone
Zone | UK SIM / eSIM | Global eSIM | Calls & Texts |
Zone 1 (UK, EU/EEA) | Calls, texts & data active | Optional backup | ✅ Unlimited |
Zone 2 (Popular destinations) | Calls, texts & data active | Optional backup | ✅ Unlimited |
Zone 3 (Extended travel zone) | Calls & texts only | Data active | ✅ Unlimited |
Zone 4 (Additional destinations) | Calls & texts only | Data active | ✅ Unlimited |
Zone 5 (High-cost regions) | Calls & texts only | Data active | 💰 Charged per minute & per text |
Zone 6 (Remote / maritime) | Calls & texts only | Data active | 💰 Charged per minute & per text |
💬 In Zones 3–6, your Global eSIM handles data, while your UK SIM keeps your number for calls and messages.
In Zones 5 & 6, calls and texts are still possible but billed per minute and per text at standard international rates.
🧠 FAQs
Q: Will my calls still work when abroad?
A: Yes — your UK SIM handles calls and texts in all zones. They’re unlimited in Zones 1 – 4 and pay-per-use in Zones 5 & 6.
Q: Do I need to switch SIMs manually?
A: No — enable Mobile Data Switching and your phone will manage it automatically.
Q: Can I use the Global eSIM in the UK?
A: Yes — it connects to all four UK networks for backup and testing.
💬 Need Help?
Our UK-based team is available 7 days a week (6 am – 10 pm UK time):
📞 0330 038 3852
✅ Next Step
Need to check which countries fall into each zone?