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Network & APN Settings beginner 4 min read

How eSIM Activation Works When Traveling Abroad

Understand when to install and activate your eSIM for seamless connectivity upon arriving at your destination.

Updated Jan 30, 2026
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How eSIM Activation Works When Traveling Abroad

One of the biggest questions travelers have is: When should I install and activate my eSIM? This guide explains the entire process.

The eSIM Timeline

1. Before Your Trip (At Home)

Purchase and install your eSIM while on Wi-Fi:

  • Buy your Roambit data plan
  • Scan the QR code to download the eSIM profile
  • Your eSIM is now installed but not yet active
  • Your data plan validity has not started yet

Best practice: Install your eSIM 1-3 days before your trip while you have a stable Wi-Fi connection.

2. At the Airport / On the Plane

  • Your eSIM remains installed but inactive
  • You don't need to do anything yet
  • Your data allowance is not being used

3. Upon Arrival

Activate your eSIM when you land:

  1. Turn off Airplane Mode
  2. Go to Settings and select your Roambit eSIM for data
  3. Enable Data Roaming
  4. Your phone will connect to a local network
  5. Your plan validity period starts now - when the eSIM first connects

4. During Your Trip

  • Your eSIM automatically connects to partner networks
  • When crossing borders (for regional plans), it switches carriers automatically
  • Monitor your usage through the Roambit dashboard

Key Points to Remember

Validity Period Starts on First Connection

  • Your plan's clock starts when the eSIM first connects to a mobile network at your destination
  • Not when you purchase, not when you install - only when you connect
  • This means you can buy well in advance without wasting any days

Keep Your Primary SIM Active

  • Your regular SIM card stays in the phone
  • Use Roambit eSIM for data only
  • Receive calls and texts on your primary number
  • You won't be charged roaming on your primary SIM for data (since you're using the eSIM for that)

Dual SIM Setup Recommendations

Line Function SIM
Calls Incoming & outgoing Primary SIM
Messages SMS/iMessage Primary SIM
Data Internet, apps Roambit eSIM

Common Activation Questions

Q: What if I install the eSIM but don't turn on data roaming - does the plan start? A: No, your plan only starts when the eSIM successfully connects to a mobile network. Simply having it installed doesn't start the clock.

Q: Can I test my eSIM before traveling? A: We don't recommend it, as it may start your validity period. If you want to verify the installation was successful, check that the eSIM appears in your SIM settings - that's sufficient.

Q: What if my eSIM doesn't connect when I land? A: Follow our No Service After Installation troubleshooting guide.

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