Give each line one job
Use your home line for the number you want to keep and the travel eSIM for mobile data.
Practical guide
Using dual SIM while travelling
Keep your home number available while the travel eSIM handles mobile data. Use the checklist below to verify the key details.
Reading time4 minutesUpdated 21 July 2026
Turn off automatic data switching
Automatic switching can send data through your home line when the travel signal changes.
Check call and message charges
Receiving a text may be free or charged depending on your home network and location. Calls can still create roaming charges.
Watch battery use
Keeping two lines active can use more battery, especially when one network has a weak signal.
Follow the plan instructions
Phone menus and activation rules differ. Use the instructions that came with the exact plan you bought.
Common questions
What to check before you buy
Can I do these steps before departure?
You can complete many checks and installation steps over reliable Wi-Fi before travelling. First confirm what starts the plan so you do not begin it too early.
Do all phones use the same menu names?
No. Menu names differ by operating system, phone maker and software version. Use the phone maker’s current instructions when the wording is different.
What should I save offline?
Save the QR code or manual setup details, order number, provider instructions and support contact somewhere you can open without mobile data.
Explore
Read another guide
How travel eSIMs workUnderstand how an eSIM is installed, when it starts and how to use it for mobile data.→Install an eSIM on iPhoneSet up an eSIM on an iPhone and avoid common roaming mistakes.→Install an eSIM on AndroidSet up a travel eSIM on a supported Android phone and use it for mobile data.→Check eSIM compatibilityCheck whether your phone supports eSIM, is unlocked and can use two SIMs.→eSIM vs international roamingCompare the price, convenience and setup of a travel eSIM and ordinary roaming.→How much travel data do you need?Estimate the data you need for maps, messages, video, hotspot use and work.→