Updated · 3 min read
The most common worry before buying an eSIM: will WhatsApp stop working? No. WhatsApp is registered to your phone number, not to the SIM that currently provides internet.
Why WhatsApp keeps working
A travel eSIM provides mobile data. WhatsApp uses that connection but stays logged in with your existing number. Chats, groups and contacts stay as they are. The same applies to Telegram, Signal, iMessage and other internet-based apps.
What not to do
- Do not reinstall WhatsApp or change the number inside the app.
- Do not remove your home SIM if you expect SMS codes from your bank.
- Do not start a new SMS verification while your home SIM has no signal.
Keep your home SIM switched on with data roaming off. You still receive SMS, such as banking codes, without paying for mobile data. Note that your home operator may charge for incoming calls abroad.