Short answer: on iPhone, first check mobile data line selection and data roaming. APN is usually not the first troubleshooting step for iPhone.
Steps
- Open Settings > Cellular or Mobile Service.
- Select the label used for your 4S eSIM as mobile data.
- Open that eSIM line and turn on data roaming.
- Turn off Wi-Fi briefly and test a website.
- Restart the iPhone.
Your phone may not show the name 4S eSIM unless you chose that label during installation. Look for the label you selected, a travel/secondary/business label, or a line that shows No Number.
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.