Short answer: check your phone's SIM/eSIM list and compare the ICCID before trying to install the same eSIM again. Most eSIM profiles can only be installed once.
When your phone asks you to name or label the eSIM during installation, choose a clear label you will recognize later, such as 4S eSIM, your destination country or region, or Travel.
If you did not rename it, look for the newly added eSIM, a travel/secondary/business label, or the line that shows No Number.
Why this matters
If you try to scan or install the same code again, your phone may show an invalid code or code no longer valid message. If you have multiple eSIM profiles, you may also accidentally select an older line that no longer works.
Confirm the installed eSIM by ICCID
The most reliable way to identify your 4S eSIM is to compare the ICCID. The ICCID is usually a 20-digit number that starts with 89.
- Open your 4S eSIM installation page or 4S service page and find the ICCID shown for your purchased eSIM.
- On your phone, find the installed eSIM ICCID.
- Compare the ICCID on your phone with the ICCID on your 4S page. You can compare the full number or the last 6 digits.
iPhone
Go to Settings > General > About, then scroll down to the eSIM / SIM section and look for ICCID. If the ICCID matches the ICCID on your 4S page, that eSIM is already installed on your iPhone.
Samsung
Go to Settings > Connections > SIM manager, select the eSIM line, then open More information if available. Look for ICCID.
Google Pixel and other Android phones
Try Settings > Network & internet > SIMs to find the eSIM line. Then check Settings > About phone > SIM status or SIM status (SIM slot 1 / SIM slot 2) and look for ICCID.
Android menu names vary by brand and Android version. If you cannot find the ICCID, send support a screenshot of your SIM/eSIM list and your 4S eSIM installation page. Do not post your full ICCID publicly.
Where to check the SIM/eSIM list
- iPhone: Settings > Cellular or Mobile Service.
- Samsung: Settings > Connections > SIM manager.
- Google Pixel: Settings > Network & internet > SIMs.
What to look for
- A label you chose during installation, such as 4S eSIM, your destination country or region, or Travel.
- A default iPhone label such as Travel, Business, Secondary, or Personal.
- A line that shows No Number.
- A recently added eSIM profile.
- An ICCID that matches the ICCID on your 4S eSIM installation page.
If several lines look similar
If several eSIM lines show No Number or similar labels, try the most recently added line first. A newer or replacement eSIM profile may invalidate a previous profile, so the older line may remain visible but no longer provide data.
If ICCID is visible, use the ICCID match as the best confirmation. Do not delete older eSIM profiles until you confirm which line works. If you are not sure, send support a screenshot of the full SIM/eSIM list.
Need to confirm which eSIM is yours? See How to identify your 4S eSIM by ICCID.
Need help?
If you cannot tell whether the eSIM is already installed, contact 4S support through support@4s.net, a Zendesk support ticket, or Zendesk live chat. Include your order email, ICCID if available, phone model, and a screenshot of your SIM/eSIM list.