Guide

eSIM not working? A step-by-step troubleshooting checklist

From airplane mode to a carrier-locked phone: every common reason an eSIM isn’t working, and what to check yourself at each step before contacting support.

Published September 21, 2026 · Updated October 1, 2026 · 7 min read · MoreSim editorial team

An eSIM usually isn’t working because of your phone’s settings, not the profile itself: airplane mode is still on after landing, the eSIM isn’t set as the data line, or data roaming is off for it. Check those three things, then your remaining data and the plan’s validity — that fixes most cases. Less often the cause is a carrier-locked phone or network bands your phone doesn’t support.

eSIM not working? Check these steps in order

If your eSIM isn’t working, don’t reinstall the profile or message support first; start with this short list. It fixes most cases in a couple of minutes. Every step is easy to verify: you either see the right state on screen or fix it on the spot.

1. Turn off airplane mode. While it’s on, the phone won’t connect to any network, neither the eSIM nor your home SIM.
2. Open your cellular (mobile) settings and make sure the eSIM line is on: the toggle next to it should be active, not grayed out.
3. Check which line is set for mobile data. The MoreSim eSIM should handle data, not your home number.
4. Open the eSIM profile and turn on data roaming: a travel eSIM runs on the local network as a roaming line, so without it you won’t get data. If your plan’s instructions say otherwise, follow them.
5. See whether the eSIM line shows signal bars. If there are none, step outside into the open and wait a minute.
6. Turn airplane mode on and off again so the phone rescans available networks.
7. If it still doesn’t pick a network, open network selection, turn off automatic mode and choose a partner network manually.
8. Check your remaining data and the plan’s validity in your account on the website or in the bot @moresim_bot.
9. Restart your phone. This helps when the profile is installed correctly but the system didn’t pick it up after installation.
10. If there’s still no data after all these steps, contact support: /support in the bot, a ticket in your account or email at admin@moresim.online.

Airplane mode, data line and data roaming: the big three

The three most common causes sit side by side in the same settings section, and they’re easy to mix up. The first is airplane mode: it sometimes stays on after landing, so the plane icon at the top of the screen is the first thing to check.

The second cause is the data line. On a phone with two lines, the system asks which number to use for calls and which for data. If you picked your home number during setup, the eSIM will show as active, but data will go through your home carrier’s roaming or not at all. Your cellular settings have a separate item, such as “Cellular Data” or “Mobile data SIM”; the name depends on the model and software version.

The third is data roaming on the eSIM itself. The logic feels odd at first: most travel eSIMs run on the local carrier’s network as roaming lines, so the toggle must be on for the MoreSim profile. On your home SIM, by contrast, turn off mobile data so you don’t use data through your home carrier; leave the line itself on if you’re expecting bank texts.

The eSIM is installed but turned off

Sometimes an eSIM is added to the phone and shows up in the list of lines but isn’t active. This happens if you postponed setup during installation or switched the line off so it wouldn’t get in the way at home. In the list of plans, such a line is marked “Off” or has a gray toggle.

Turn the line on and give the phone a minute to register on the network. If a local carrier’s name appears next to the profile, you’re good, and you can move on to checking data and roaming. The carrier name won’t be MoreSim: the eSIM connects to partner networks in the country, and that’s normal.

Is the plan not active yet, or has it run out?

A plan starts counting not when you buy it but on first connection to a network in the destination country. So an eSIM bought a week before your flight just waits for the trip and uses nothing. The flip side: while you’re at home the profile can look dead, and that’s not a fault.

If data was working and then stopped, you’ve most likely used up your data or the plan has expired. You can see your balance in your account and in the bot. Top-ups happen there too, with “Top up data” on the eSIM card, if top-ups are available for that plan. No new eSIM needed; the data is added to your current profile.

• Out of data: the internet stops all at once, while signal bars stay.
• Plan expired: the line may still be listed, but data no longer goes through.
• Plan not activated: you haven’t connected to a network in the destination yet.
• Your home SIM is using data instead of the eSIM: check which line is set for data.

Why is there no internet on my eSIM when I have signal?

A separate case: signal bars are there, the carrier name shows, but pages won’t load. The culprit is usually not the plan but your settings. Check whether a VPN from a previous trip is still on, whether the system has a data limit set, and whether you’ve chosen a network mode that simply isn’t available in that area.

Selecting the carrier manually also helps: automatic mode sometimes latches onto a weak partner network and won’t let go until you tell it to. We cover this case in detail in a separate article, with a step-by-step guide on what to check when you’re connected but have no internet.

eSIM not working on iPhone or Android

The causes are the same on both; only the menu names differ. On iPhone it’s Settings, then Cellular (Mobile Data), the list of plans and Cellular Data, while Data Roaming sits inside each plan. On Android the path is similar: Connections or Network & internet, then SIMs. But on Samsung, Xiaomi, Honor and other brands, the items have different names and sit at different depths in the menu.

If you can’t find the toggle you need, search for “roaming” in the built-in Settings search. Almost every modern phone has one, and it takes you straight to the right screen without digging through menus.

Rare causes: a locked phone and network bands

Phones bought on an installment plan from a carrier abroad can be carrier-locked: they either refuse other providers’ profiles or accept them but won’t register on the network. You can check your model in advance in the bot @moresim_bot, which has a built-in compatibility check. Only the carrier that sold the phone can unlock it.

Even rarer is a band mismatch: a phone built for another region may not support the frequencies the local network uses. The symptom is telling: you have signal in a big city, but outside it the phone loses the network where your travel companions stay connected. Neither settings nor a different plan will fix this.

Order matters: the first items on the list solve most cases, and it rarely comes down to bands or a lock. Work through the checks calmly, top to bottom, and don’t change several settings at once, or you won’t know what actually fixed it.

Tell us what you see on screen: whether there are signal bars, which carrier name is shown and which line is set for mobile data. With those three details, we can usually find the cause from the very first message.