eSIM

eSIM Not Working Abroad? The 2-Minute Fix Checklist (2026, iPhone and Android)

You installed it at home, you landed, and nothing loads. Phones do not switch the right toggles on by themselves. The checklist in the order that fixes it fastest, on iPhone and Android, and what to do if it is still dead.

Quick answer: If your travel eSIM is not working abroad, check in this order: Data Roaming is on for the eSIM line, the line is turned on, the eSIM is chosen for cellular data, then toggle Airplane Mode for 30 seconds or restart. Next pick a network manually and enter an APN if your plan lists one. Do not delete the eSIM. If it still fails, send support your Order ID, ICCID, phone model and a screenshot.

Key takeaways

Phones do not turn on roaming for a new line by themselves. Data Roaming off on the eSIM line is the most common reason a travel eSIM shows nothing, per Fizen's own troubleshooting guide.
The order matters: roaming on, line on, eSIM set for cellular data, Airplane Mode toggle, restart, manual network, APN, data balance.
Turn off automatic data switching so the phone does not fall back to your home SIM and run up roaming charges.
Never delete the eSIM while troubleshooting. A deleted eSIM cannot be reinstalled; a non-working one can usually be fixed in chat.
iOS 26 can do part of it for you: Apple says the iPhone may offer to turn on your travel eSIM when you land.
Genuine faults happen. With Fizen, a confirmed Fizen-side fault gets a free 1-for-1 replacement or a refund for the days you could not use, for the whole trip.

You did everything right. You installed the eSIM at home, landed, switched off Airplane Mode, and the status bar says No Service, or shows bars with nothing loading. The arrivals Wi-Fi wants a code sent to a phone number. It is a horrible five minutes, and in most cases it is one toggle away from fixed.

Why is my eSIM not working abroad?

A new travel line arrives with some settings off by design, so it does not cost you roaming on your home number. That is why the fix is usually a toggle, not a fault. Match what you see:

What you see	Most likely cause	First thing to try
No Service on the eSIM line	Line off, or Data Roaming off	Turn the line on, enable Data Roaming
Bars but no internet	Data still set to the home SIM, or APN missing	Choose the eSIM for cellular data, check APN
SOS only or Searching	Not yet registered on the local network	Airplane Mode for 30 seconds, then restart
Works, then drops	Weak partner network in that spot	Pick another network manually
Roaming text from your home carrier	Home SIM still has data roaming on	Turn off data roaming on the home line
Connected, nothing loads after days	Data allowance used up	Check the balance, buy a new plan

What should you check first? The 2-minute checklist

Are you in a covered country? A Japan plan will not connect in Korea; regional plans list their countries.
Turn on Data Roaming for the eSIM line. iPhone: Settings > Cellular > [eSIM line] > Data Roaming. Samsung: Settings > Connections > Mobile networks > Data roaming, with the eSIM selected. Pixel: Settings > Network & internet > SIMs > [eSIM] > Roaming.
Make sure the line is on. iPhone: Turn On This Line. Android: switch the eSIM on in SIM manager.
Set the eSIM as the cellular data line. iPhone: Settings > Cellular > Cellular Data. Samsung: SIM manager > Mobile data. Pixel: SIMs > data preference.
Toggle Airplane Mode on for 30 seconds, then off, to force a fresh registration. Still nothing? Restart.
Select a network manually. Turn off automatic selection for the eSIM line and pick a network from the list; if one fails, try another.
Enter the APN if your plan lists one. iPhone: Settings > Cellular > [eSIM line] > Cellular Data Network. Android: Mobile networks > Access Point Names.
Check the data balance. In the Fizen app it is eSIM > My eSIMs.

Why does my eSIM show bars but no internet?

Bars mean the phone found a network; no internet means data is not flowing through it. Three usual causes:

Cellular data is still on the home SIM, which has roaming off, so nothing moves.
Automatic data switching is on. iPhone calls it Allow Cellular Data Switching, Samsung calls it Auto data switching. Turn it off so the phone sticks to the eSIM.
A VPN or Private DNS profile is blocking the first connection. Pause it, get online, then turn it back on. More in eSIM vs VPN when travelling.

What else can stop an eSIM on iPhone?

The arrival prompt. On iOS 26 Apple says you may see "Turn On Travel eSIM", with a choice of Travel eSIM Only or Travel eSIM and Current eSIM. Accept it, or set the lines by hand.
Carrier lock. Settings > General > About should show "No SIM Restrictions" next to Carrier Lock. A locked phone may refuse another provider's eSIM.
Carrier settings update. On Wi-Fi, open Settings > General > About; iOS offers any update there.
Reset Network Settings, last. It clears saved Wi-Fi and VPN settings. Read every warning, never choose an option that erases eSIMs, and ask support first.

What else can stop an eSIM on Samsung or Android?

SIM manager: the eSIM switched on and set for Mobile data, calls and texts left on the home SIM.
Network mode: an automatic mode that includes 4G and 3G, so the phone can use whatever the partner network offers.
Data saver and battery saver: aggressive modes block background data; turn them off while testing.
Private DNS: Settings > Connections > More connection settings > Private DNS, set to Automatic or Off while troubleshooting.

Going to China? Set it up before you land

Install and activate a China eSIM fully before arrival: the activation page can be blocked once you are on the ground. A travel eSIM that routes traffic outside China is what lets Google and WhatsApp work there without a VPN.

Still not working? What to send support

Do not delete the eSIM. Open the in-app chat and send four things, so nobody has to ask twice:

Order ID from your purchase confirmation
ICCID from the eSIM details screen in My eSIMs
Phone model
A screenshot of the error or settings screen

If a Fizen eSIM fails because of a fault on Fizen's side, a real person in the in-app chat sorts it out: a free 1-for-1 replacement, or a refund for the days you could not use, for the whole length of the trip once support confirms the fault. Changed plans? An unused, not-yet-installed eSIM can usually be taken back; eligibility depends on the plan, check Package details or ask chat.

Fizen sells data-only travel eSIMs in 150+ countries. Pay with USDT on Solana or BNB Chain in the app, or by card via Stripe (Visa or Mastercard international cards, Apple Pay, Google Pay). See destinations on the Fizen eSIM store.

New users get US$10 of eSIM credit in the Fizen app's eSIM tab: it is added automatically the first time you open the tab, with no code, and the app shows how much comes off your order before you pay. Buying in the Fizen app is also how you pay with USDT on Solana or BNB Chain.

Frequently asked questions

Why is my eSIM not connecting after landing?

Most often Data Roaming is off for the eSIM line, or cellular data is still assigned to your home SIM. Turn roaming on for the eSIM, choose it for cellular data, then toggle Airplane Mode for 30 seconds.

Do I need to turn on data roaming for an eSIM?

Yes, on the eSIM line. A travel eSIM is a roaming line abroad, so the phone will not use it for data until Data Roaming is on. Leave roaming off on your home line.

Should I delete and reinstall my eSIM if it is not working?

No. A deleted travel eSIM usually cannot be reinstalled. Keep it installed and contact support with your Order ID and ICCID.

Why does my eSIM say SOS only?

The phone has not yet registered on a partner network. Toggle Airplane Mode, restart, then pick a network manually if it persists.

What if my eSIM is faulty?

With Fizen, once support confirms a Fizen-side fault you get a free 1-for-1 replacement or a refund for the days you could not use, for the whole length of the trip.

An eSIM with a real person behind it

Data-only travel eSIMs in 150+ countries. If one fails on our side, a real person in chat replaces it 1-for-1 or refunds the days you could not use. Pay with USDT on Solana or BNB Chain in the app, or by card via Stripe (Visa or Mastercard international cards, Apple Pay, Google Pay). Not offered to US Persons.

See eSIM plans

Terms and conditions

Information only. Fizen publishes this article to inform, not to sell. Nothing here is an offer, solicitation or sale of any product or service, and it is not financial, investment, legal or tax advice.
For readers in the United States. This article provides information only. It is not an offer, solicitation or sale of any product or service, and it is not financial, investment, legal or tax advice. Fizen is not offered to US Persons.
Trip Guarantee scope. Replacements and refunds apply to genuine Fizen-side eSIM faults as set out in Fizen's Trip Guarantee terms. Settings issues are handled with guided help in chat. An installed eSIM cannot be returned for a change of mind.
Independent. Fizen is not affiliated with Apple, Samsung, Google or any carrier mentioned here. Menu names differ by model, software version and region.
Data only. A Fizen travel eSIM carries data only: no local phone number, no calls, no SMS. Keep your home SIM active for bank one-time codes. Your phone must support eSIM and be carrier-unlocked, and most Fizen eSIMs cannot be topped up, so more data means a new eSIM.
Plans vary. Networks, validity, hotspot use, speed after the high-speed data and return eligibility are shown in Package details at checkout, which take precedence over this article. Every payment method stays subject to sanctions law and the Fizen Terms of Use.
Full terms. Master Terms of Use, Privacy Policy and Disclaimer on the Fizen site.

Sources

Updated 25 October 2026. Menu names vary by phone model and software version.