Traveler holding a phone open to SIM data settings at an airport

After you install the eSIM

Set which SIM your phone uses

Your phone can keep using your main SIM for mobile data. These settings tell it to use the CleverFi eSIM for data, and to leave calls and texts on the SIM that has your number.

iPhone Android

Why this matters

Mobile data

Maps, chat, and browsing should use the CleverFi eSIM. If data stays on your main SIM, that plan’s credit is what gets spent.

Automatic switching

Phones can fall back to the main SIM when the eSIM signal is weak. Turn that option off so the switch does not happen in the background.

Calls and SMS

A travel eSIM is for data. It does not replace your phone number, so leave calls and texts on your main SIM.

iPhone

Where to open it: Settings → Cellular

On some iPhones this menu is called Mobile Service.

Open Cellular

This menu chooses which SIM is used for data, calls, and texts.

Put mobile data on the eSIM

Tap Cellular Data and select CleverFi. Then turn off Allow Cellular Data Switching. If that switch stays on, the iPhone can use your main SIM whenever the eSIM signal is weak.

Keep calls and texts on your main SIM

Set Default Voice Line to your main SIM. New calls and messages use that line. The eSIM stays reserved for data.

Android

Where to open it: Settings → Network & internet → SIMs

On Samsung: Settings → Connections → SIM manager.

Open the SIM menu

This screen lists a preferred SIM for mobile data, calls, and SMS.

Choose a SIM for each option

Set Mobile data to CleverFi. Set Calls and SMS to your main SIM, because the travel eSIM does not include a phone number.

Stop automatic data switching

Turn off Switch data automatically. Names vary by brand, such as Smart switch. Leave it off so the phone does not spend your main SIM’s data in the background.