If your eSIM keeps connecting and dropping, the fastest way to find the cause is usually to work through it in this order: “weak signal areas” → “automatic network selection” → “data-saver and battery-saver settings” → “resetting network settings.” Rather than changing everything at once, try one step at a time from the top and stop as soon as things improve. This guide lays out the checks for an intermittent connection in plain terms, so even first-time users can follow along. When you’re traveling, it’s easy to worry about being out of reach, but most drop-outs come down to signal or settings—and working through them in order helps you stay calm and fix it. Take a breath and start from the top.
Note that Bloomy eSIMs are generally data-only. They don’t include a phone number, SMS, or voice calls, so if you need those, pair the eSIM with another option (a local SIM, a plan that includes a number, or app-based calling such as WhatsApp). Connection stability and speed also depend on the local network, your area, and how busy the network is (as of June 2026). Plan details and supported conditions can change, so please check the latest information before you buy.
Common reasons an eSIM connection drops or becomes unstable
“Slow” and “dropping” can look similar but usually have different causes. If it’s only slow, the issue is often about remaining data or network congestion. But if it repeatedly connects and disconnects, it’s often related to how the signal is being received or to a setting on your device. Figuring out which symptom is closest to yours helps you check efficiently. Here are the most common causes.
| Symptom | Common cause | What to check first |
|---|---|---|
| Drops when you move around | Weak-signal area, indoors, underground | Check the signal bars by a window or outdoors |
| Keeps losing and regaining signal | Unstable automatic network selection | Switch carrier selection to manual |
| Stops in the background | Data-saver or battery-saver mode | Turn off Low Power / Data Saver |
| Unstable ever since setup | Inconsistent network settings | Reset and reconfigure settings |
| Only one app stops working | Mobile data turned off for that app | Check per-app data permission |
There may be more than one cause, so from the next section we’ll start with the least disruptive steps first. If you’re unsure about the settings themselves, it can help to first review the steps in how to set up an eSIM.
Quick fixes to try first (takes about 30 seconds)
Before digging into settings, a few light steps often do the trick. Try them in this order.
- Turn Airplane Mode on for 30 seconds, then off: this re-establishes the connection.
- Restart your device: this clears up most temporary glitches.
- Check the signal bars and network name: make sure you’re not out of service or latched onto a different network.
- Turn off Wi-Fi and test on the eSIM connection: switching between Wi-Fi and mobile can make things look unstable.
If things stabilize here, the cause was temporary. If it still drops, move on to “Signal and location” below and narrow it down step by step. For other snags—such as “restarting and Airplane Mode didn’t help” or “it’s stuck while activating”—see the symptom-by-symptom roundup in what to do when you can’t connect.
When a weak-signal area is the cause
The most common reason for intermittent drops is simply being in a weak-signal area. An eSIM connects to the internet using the mobile networks available where you are, but underground, inside large buildings, in mountainous areas, or in the outskirts of town, the signal weakens and your device repeatedly grabs and loses the connection. This isn’t a fault with your device or eSIM—it’s a temporary result of the signal environment in that spot.
- Move near a window or outdoors and see whether the signal bars recover.
- On the move (train, bus, car), the signal changes constantly, so re-check once you’ve stopped.
- Lower floors or tucked-away rooms in a hotel can get poor reception, so try a common area or a higher floor too.
- If other people’s phones are also unstable in the same spot, it’s likely the area is congested or has weak coverage.
If moving to a different spot makes it stable, it isn’t a device or settings problem. Note that plain slow speeds have a different cause, so for questions about data allowance or congestion, also see our FAQ.
Reviewing automatic network selection
Most devices are set to automatically choose the network with the best signal. But in places where several networks reach you, automatic selection can hesitate and cause the signal to drop and return repeatedly. In that case, try manual selection.
The general flow for manual selection
- Choose the eSIM line under “Mobile/Cellular / SIM” in Settings.
- Switch “Network Selection” from “Automatic” to “Manual.”
- From the networks shown, pick one that connects reliably.
- If it doesn’t work, switch back to “Automatic” and re-establish the connection with Airplane Mode.
Also check whether Data Roaming is turned on. An eSIM used abroad is often treated as roaming, and if this is off it can cause intermittent connection problems. The exact wording varies by device, so checking alongside the steps in our setup guide is the surest approach.
Where to look on iPhone vs. Android
The labels vary by manufacturer and model, but here’s a rough guide to where to look. If you’re unsure, noting your device name and the symptom makes it easier to talk to support.
- iPhone: Settings → Cellular/Mobile Data → (the relevant eSIM line) → Network Selection / Data Roaming
- Android: Settings → Network & internet → SIMs / Mobile network → Automatically select network / Roaming
Are data-saver or battery-saver settings throttling your connection?
Settings that save battery or data can quietly stop background traffic, making it “look like” the connection has dropped. Check the following settings.
| Setting | Effect | Recommendation |
|---|---|---|
| Low Power / Battery Saver mode | Limits data and updates | Turn off temporarily when unstable |
| Data Saver mode | Restricts apps’ background traffic | Allow the apps you need |
| Automatic 5G/4G switching | Can be unstable at the boundary | Try locking to 4G (LTE) |
| Per-app mobile data | If off for an app, it won’t work | Turn on the apps you use |
If turning off Low Power mode and Data Saver mode temporarily improves things, that’s your cause. You can keep the saver settings on day to day, but switch them off once to help narrow down the issue. Once you’ve confirmed the improvement, allow data for just the apps you need and turn the saver settings back on—that makes it easier to balance battery life and stability.
Resetting network settings (the last resort for narrowing it down)
If nothing above fixes it, try resetting your network settings. This restores Wi-Fi passwords and connection-related settings to their defaults, and it helps when inconsistent settings are the cause. It’s safest to leave this for last.
Before you do this: resetting clears things like saved Wi-Fi passwords, so you’ll need to re-enter them. In rare cases the eSIM may need to be set up again (reinstalling the profile), so make sure you can quickly access your QR code or setup details before you start. You can find your purchased eSIM information and QR code in My Account.
- First confirm you can view your eSIM details and QR code in My Account.
- From “Reset” in Settings, run “Reset Network Settings.”
- After restarting, check whether the network appears.
- If needed, reinstall the eSIM profile and turn Data Roaming on.
If you run into trouble setting things up again after the reset, what to do when you can’t connect has step-by-step guidance by symptom.
What to avoid when it’s dropping—and a checklist to remember
Rushing into changes can actually make the situation harder to read. Keeping just these points in mind helps.
- Don’t delete the eSIM profile on a whim: you’ll have to reinstall it. First make sure you can access your QR code and details in My Account.
- Don’t change several settings at once: you won’t know what worked, so check one at a time.
- Narrow it down before rushing to buy a new plan while abroad: signal or settings are often the cause, so work through this guide’s order first.
Here’s a simple checklist you can use before you set off or between stops.
- Have you tried Airplane Mode on/off and a restart?
- Have you checked in a good-signal spot, such as by a window or outdoors?
- Is Data Roaming turned on?
- Have you temporarily turned off Low Power and Data Saver modes?
- Have you checked your remaining data in My Account?
Still not fixed? How Bloomy can help
If it’s still unstable after these steps, check your device’s compatibility and your plan’s conditions. If you’re unsure whether your device supports eSIM, it’s a good idea to first check eSIM-compatible devices.
- Review your destination, data allowance, and duration: see whether the plan fits your trip on our eSIM comparison page.
- Check your remaining data: if data runs low you won’t be able to connect, so check the balance in My Account. If you’re running short, you can also top up.
- Reach out if it’s still unresolved: contact us via our contact page with your symptoms and device name, and our support team can help.
Bloomy is focused on making sure first-time eSIM users abroad aren’t left stuck after they buy. We’ve also gathered the basics of setup and troubleshooting in our eSIM guide, so it can help as you prepare before you travel.
Note: connection stability and speed depend on the local network, your area, and how busy the network is. Plan details and supported conditions can change, so please check the latest information before you buy (as of June 2026). Bloomy eSIMs are generally data-only.
