WhatsApp, iMessage and bank codes with a data-only eSIM
Updated
A data-only eSIM has no phone number, but WhatsApp, iMessage and FaceTime keep working over its data with your usual account and number. For bank one-time codes (OTP) and two-factor codes sent by SMS, keep your home line turned on.
WhatsApp and other messaging apps
WhatsApp, Telegram, Signal, Messenger and similar apps run over the internet. Your account stays linked to your usual number, so you do not need to verify again. Avoid reinstalling the app or re-registering while abroad, because verification sends an SMS to your home number.
iMessage and FaceTime on iPhone
If you keep your home line on next to the travel eSIM, iMessage and FaceTime keep working on your home number. Apple notes that even if you use only the travel eSIM, iMessage and FaceTime continue to work on your home line.
- To check the numbers and addresses used, go to Settings > Apps > Messages > Send & Receive.
- For FaceTime, go to Settings > Apps > FaceTime and look under You Can Be Reached By FaceTime At.
On iOS 17 and earlier, Messages and FaceTime are directly in Settings, without the Apps step. Your Apple Account email works as an alternative to your number.
If you see "Waiting for activation", turn iMessage and FaceTime off, restart the iPhone and turn them back on. Activating a phone number needs an SMS on your home line, which your home carrier may charge for.
Bank OTP and two-factor codes on a data-only eSIM
- Keep your home SIM turned on in dual SIM mode so you can receive SMS codes, with its Data Roaming turned off.
- Your home carrier may charge for SMS received abroad. Check before you go.
- Where your bank or service allows it, switch to app-based codes or an authenticator app before you travel.
To stop your home SIM from using data, follow how to avoid home carrier roaming charges.
Making calls
Call with WhatsApp, FaceTime Audio, Messenger or another internet app. If your home carrier supports Wi-Fi Calling, you may also use your home number over Wi-Fi: check its fees first.
Quick answers
Do I need to verify WhatsApp again with the travel eSIM?
No. WhatsApp keeps using your existing account and number. Just keep the app installed and signed in, and it works over the eSIM's data.
Will I get bank SMS codes on the travel eSIM?
No. The travel eSIM has no phone number. Bank codes sent by SMS go to your home number, so keep your home line turned on if you need them.
Need help?
Read does my eSIM include a phone number or SMS and using a physical SIM and an eSIM together, or contact us through the contact page.
Was this article helpful?