How to fix eSIM not connecting on Samsung Galaxy

Start by making sure Samsung Galaxy is using the ZEN travel eSIM for mobile data, then set the Samsung Galaxy APN to data00.telnyx.

1. 01Open Settings > Connections > SIM manager > Mobile data and choose eSIM 1, Travel, Secondary, or the plan label shown on your phone as the mobile data SIM.
2. 02Open Settings > Connections > Mobile networks > Access Point Names.
3. 03Create or edit the Access Point Name for the travel eSIM.
4. 04Enter data00.telnyx, save it, and select that APN for the travel eSIM.
5. 05Do not change the APN on your primary SIM while troubleshooting the travel eSIM.

Data roaming must be set from the Samsung Galaxy settings path for the travel eSIM, not from the primary SIM settings.

1. 01Open Settings > Connections > Mobile networks > Data roaming.
2. 02If you are using the plan in the United States, set Data Roaming to OFF.
3. 03If you are using the plan outside the United States, set Data Roaming to ON.
4. 04Keep data roaming off on your primary SIM if you want to avoid home-carrier roaming charges.
5. 05Wait a minute for the phone to re-register after changing this setting.

Automatic network selection can stick to a weak roaming partner. Manual selection forces the phone to try a different local carrier.

1. 01Open Settings > Connections > Mobile networks > Network operators.
2. 02Turn automatic network selection off and wait for the full carrier list to load. This can take a minute.
3. 03Choose one available local network and wait for the phone to register.
4. 04Open a simple website to test data. If it fails, return to the list and try another available network.
5. 05Turn automatic selection back on after data works, especially before moving to another city or country.

Restarting reloads the SIM profile, roaming state, and selected network after the settings are correct.

1. 01Turn airplane mode on.
2. 02Wait 30 seconds.
3. 03Turn airplane mode off and wait for the phone to register again.
4. 04If data still does not load, Hold the side key and volume down, choose Power off, wait 30 seconds, then turn the Galaxy phone back on.
5. 05Open a browser and test a simple website before opening maps, social apps, VPNs, or other data-heavy apps.

A travel eSIM can only attach where the selected plan has coverage. Regional plans still have country lists, and border areas can briefly connect to the wrong network.

• Confirm you are in a supported country for the exact plan.
• Move out of basements, aircraft mode dead zones, or remote areas before retesting.
• If you just landed, allow a few minutes for the phone to register.

VPNs, private DNS, parental controls, and some security apps can block the first connection test. Disable them briefly, retest data, then turn back on only the tools you need.