Short answer: turn on data roaming for the eSIM label used for 4S. Do not turn on roaming for your primary SIM unless you want to use it abroad.
iPhone
- Open Settings > Cellular or Mobile Service.
- Tap the eSIM label used for 4S.
- Turn on Data Roaming.
Android
- Open SIM or mobile network settings.
- Select the eSIM label used for 4S.
- Turn on roaming for that line.
Need help?
Contact 4S support through support@4s.net, a Zendesk support ticket, or Zendesk live chat. Do not reply to hi@4s.net; it is an automatic order and installation email sender.
When contacting support, include your order email, ICCID if available, destination, phone model, and screenshots of the error or SIM/eSIM settings page.