eSIM not working on Samsung? What to check, in order

Most Samsung eSIM problems abroad trace back to one of three switches: the travel eSIM is turned off, data roaming is off for that line, or mobile data is still assigned to your home SIM. Work through the list below from the top and test a web page after each step. Steps 1 to 5 fix most cases in under five minutes, and none of them deletes anything.

#	Fix	Where on a Galaxy (One UI)	Time
1	Turn the travel eSIM on	Settings > Connections > SIM manager > switch next to the eSIM	10 s
2	Turn on Data roaming for the eSIM	Settings > Connections > Mobile networks > Data roaming	10 s
3	Make the eSIM your mobile data SIM	Settings > Connections > SIM manager > Mobile data	10 s
4	Airplane mode on for 10 seconds, then off	Quick panel (swipe down) > Airplane mode	20 s
5	Choose the network by hand	Mobile networks > Network operators > turn off Select automatically	1–2 min
6	Check the APN	Mobile networks > Access Point Names	1 min
7	Restart the phone	Side key + Volume down > Restart	1 min
8	Update the software	Settings > Software update > Download and install	5–20 min
9	Reset network settings	Settings > General management > Reset > Reset network settings	2 min

1. Turn the travel eSIM on. Open Settings > Connections > SIM manager. Your travel eSIM is listed under eSIMs. If its switch is grey, tap it. Samsung's support pages say that on most Galaxy models only one eSIM can be active at a time, so turning on the travel eSIM may switch another eSIM off. A physical SIM can stay on alongside it.

2. Turn on Data roaming for that line. Go to Settings > Connections > Mobile networks and turn on Data roaming. A travel eSIM is always roaming abroad, even when you paid for it, so without this switch it connects to the network but moves no data. Samsung notes the switch is greyed out until Mobile data is on. On some US carrier models the label reads "Data roaming access". If you keep your home SIM active, make sure roaming is on for the travel eSIM, not just the home line, and consider leaving the home line's roaming off to avoid carrier charges.

3. Make the eSIM your mobile data SIM. In SIM manager, look at Preferred SIM (labelled "Primary SIM" on some US models) and set Mobile data to the travel eSIM. Calls and texts can stay on your home number. If data is still pointed at your home SIM, the phone shows signal bars from the travel eSIM but loads nothing. Also turn off "Auto data switching" if you see it, so the phone does not drift back to the home line.

4. Toggle Airplane mode. Swipe down twice, tap Airplane mode, wait 10 seconds and tap it again. This makes the phone register with the local network from scratch. It is the fastest fix right after landing, when the phone is often still trying the network it last used at home.

5. Pick the network by hand. Go to Settings > Connections > Mobile networks > Network operators, turn off "Select automatically" and wait for the list to load (up to two minutes). Choose one of the networks named in your plan details. If the first one fails, try the next. When you leave the country, switch "Select automatically" back on.

6. Check the APN. Most travel eSIMs set the APN on their own. If data still does not move, open Settings > Connections > Mobile networks > Access Point Names, make sure the travel eSIM is the selected SIM at the top, and compare the APN with the one in your installation email. If it differs, tap the three dots > Reset to default, or add a new APN with the value from the email and select it.

7. Restart. Hold the Side key and Volume down, then tap Restart. Samsung also describes a forced restart (hold both keys until the logo appears) that keeps your data and files.

8. Update the software. Settings > Software update > Download and install. Samsung lists this as the first check in its own mobile data troubleshooting guide. Do it on Wi-Fi.

9. Reset network settings. Settings > General management > Reset > Reset network settings (on some US models: Reset mobile network settings). This clears saved Wi-Fi networks, Bluetooth pairings and APN changes. Samsung states that it does not delete apps or personal data. Installed eSIMs stay in SIM manager. Use it only after steps 1 to 8.

In most cases the eSIM itself is fine and a setting is pointing the phone at the wrong line. A Galaxy with a travel eSIM holds two or more profiles, and each has its own on/off switch, its own roaming switch and its own APN. Data can only use one of them at a time. One wrong switch is enough to show full bars and no internet.

The common causes, with what each one looks like:

Cause	What you see	Fix
Data roaming off on the eSIM	Signal bars, no data, sometimes an "R" icon	Step 2
Mobile data still on the home SIM	Bars on the eSIM, data stuck or roaming charges at home	Step 3
eSIM turned off or another eSIM active	eSIM greyed out in SIM manager	Step 1
Phone stuck on a network the plan does not use	"Emergency calls only" or "No service"	Steps 4–5
Wrong or missing APN	Connected, but pages never load	Step 6
Phone carrier-locked	"SIM not supported" or the eSIM will not activate	Ask your home carrier to unlock
Model or region without eSIM	No "Add eSIM" option at all	See the next section

Carrier locks deserve a separate word. A Galaxy bought on contract from a carrier may only accept that carrier's profiles. Samsung says that devices changing carriers "may need to be SIM unlocked" and refers you to the original carrier for its unlock policy. The unlock is free in many countries once the contract is paid off, but it takes from minutes to several days, so request it before you travel.

If SIM manager has no "Add eSIM" option, your model or its regional version does not support eSIM, and no setting will change that. This catches many A-series owners. Samsung's own eSIM support page, checked on 26 October 2026, lists support like this:

Model group	eSIM support (per Samsung)
Galaxy S20 to S26 series, including FE and Edge models	Yes
Galaxy Z Fold and Z Flip, from the first models to Fold8 and Flip8	Yes
Galaxy A57, A56, A55, A37	Yes
Galaxy A54	Europe, North America, Korea, Japan
Galaxy A36, A35	Europe, North America, Korea
Galaxy A27, A26, A17 5G, A16 5G	North America only
Galaxy A25 5G, A23 5G	Japan only
Wi-Fi-only Galaxy tablets	No

Samsung adds that "depending on the country of origin, eSIM may not be supported even if your device is listed". Models sold in mainland China and Hong Kong are the usual exceptions. To check your exact phone, open Settings > Connections > SIM manager and look for "Add eSIM", or follow our compatibility guide at Is my phone eSIM compatible?.

The cleanest setup is to install the eSIM at home on Wi-Fi and switch it on after landing. Samsung's install path is the same on S, Z and A models:

1. Settings > Connections > SIM manager > Add eSIM.
2. Tap Scan QR code and scan the code from your email, or tap Enter activation code and paste the SM-DP+ address and activation code.
3. Name the eSIM (for example "Travel") so you can tell the lines apart.
4. When asked, leave calls and texts on your home SIM and leave mobile data on your home SIM until you travel.
5. Restart the phone, as Samsung recommends after adding an eSIM.

After landing:

1. Settings > Connections > SIM manager: turn the travel eSIM on.
2. In SIM manager, set Mobile data to the travel eSIM.
3. Settings > Connections > Mobile networks: turn Data roaming on.
4. Toggle Airplane mode once.

The full walkthrough with screenshots is at How do I install the eSIM on an Android phone?.

These paths are written for One UI 6, 7 and 8. Older One UI versions call SIM manager "SIM card manager", and some carrier builds rename items. If a label differs, search the Settings app for "SIM" or "roaming".

If none of the nine fixes worked, the problem is usually outside the phone's settings. Check these before anything else.

• The QR code fails to install. Errors such as "Unable to add eSIM" usually mean no internet during setup or a code that was already used. A QR code installs once. Connect to Wi-Fi and try again. Do not scan the same code on a second phone.
• You deleted the eSIM. A deleted travel eSIM cannot be reinstalled from the same QR code on most networks. Contact support before buying again. Never delete the eSIM as a troubleshooting step.
• The plan has not started or has ended. Check the plan status in your VoyaSIM account. Validity starts at the first connection in the covered country; see When does my plan start?.
• Data runs out mid-trip. A finished data allowance looks exactly like a broken eSIM: bars but no data. Check remaining data in your account and top up.
• The phone shows "No service" in the arrivals hall. Many airports have weak indoor coverage for some networks. Walk outside or wait 10 minutes. Our no-signal guide covers this case.
• Dual eSIM limits. If you already use two eSIMs at home, you may need to switch one off before the travel eSIM can be active, because most Galaxy models run one eSIM at a time.

If you have tried everything, contact VoyaSIM support with your order number, your phone model and a screenshot of SIM manager. We can check from our side whether the eSIM has registered on a network and re-issue the profile if needed.

In the Samsung community threads we read, travelers most often reported that the roaming switch or the mobile data SIM was the fix, and a factory reset was rarely needed. We do not recommend a factory reset for an eSIM problem.

For a trip across Europe, the VoyaSIM Europe 10 GB plan covers 31 countries for 31 days at $8.40 (checked on 26 October 2026): Europe 10 GB / 31 days. Install it before your flight on Wi-Fi; validity only starts at the first connection in a covered country, so installing early costs you no days. Other plans and destinations are at voyasim.io/esim/europe.

By the VoyaSIM support team — we answer these questions every day for travelers in 200+ countries. Last checked: 26 October 2026.