No worries, you can deactivate your old SIM from the Lost SIM screen on the app. You can later request for and activate a new SIM. Follow these simple steps:
- Go to more (iOS version) or the sidebar (Android version)
- Tap on your profile name and on the next screen select 'MY NUMBER'
- Select 'I LOST MY SIM' and enter your password
- Select 'DEACTIVATE YOUR SIM' and request a delivery or in store pickup