Galaxy / Android eSIM Troubleshooting

Symptoms

• Signal but no internet
• APN not auto-populated
• Wrong roaming carrier selected
• Very slow speed

Try in Order

Step 1. Toggle Airplane Mode + Restart

• Notification panel: Airplane mode ON → 10s → OFF
• If still failing, fully power off and restart

Step 2. Recheck eSIM Line / Mobile Data / Roaming

In Settings > Connections > SIM Manager:

• ✅ eSIM (travel) line ON
• ✅ Mobile data = eSIM
• ✅ Data roaming ON
• ✅ Korean SIM roaming OFF

Step 3. Manual Carrier Selection

When auto-select grabs the wrong carrier:

1. Settings > Connections > Mobile networks > Network operators
2. Disable Automatic and search available carriers
3. Pick the one esimoa indicated (or the strongest signal)

Step 4. Manual APN Entry

1. Settings > Connections > Mobile networks > Access Point Names (APN)
2. Add — fill APN name, APN, MCC, MNC etc. from esimoa
3. Set the new APN as default

Still Not Working

• Force LTE-priority (Settings > Connections > Mobile networks > Network mode > LTE/3G/2G auto)
• Toggle eSIM line OFF → ON while on Wi-Fi
• Try activating during local business hours (some new lines have delays)
• Contact support with ICCID, country, and a screenshot

FAQ

• APN entered but still nothing? → Make sure the new APN is set as default. Then toggle airplane mode once more.
• Very slow speed. → LTE-only region, or the carrier deprioritizes roaming. Try a different carrier manually.