eSIM Slow? Why Your Travel eSIM Is Slow & How to Fix It

You just landed, you switched on your travel eSIM, and you're staring at a loading spinner instead of a map. It's frustrating. You paid for data, you need it now, but the speeds feel like 2G. Before you fire off an angry email, try these fixes. They solve the majority of slow eSIM problems, often in under two minutes.

1. Check your APN settings

The Access Point Name (APN) is a small text string that tells your phone how to connect to the data network. If it's missing or wrong, your data may work but it'll crawl. Every eSIM provider gives you an APN during setup. For example, when you install an Airalo eSIM, the instructions say to set the APN to "globaldata". With Holafly, you often don't need to set one because the eSIM auto-configures, but if you're stuck, their support might ask you to add "internet" as the APN. Nomad and Saily similarly prompt you with the APN on the app's installation screen. Ubigi and aloSIM also rely on specific APN profiles.

How to fix it:

Go to Settings > Cellular (or Mobile Data) > your eSIM line > Cellular Data Network.
Under APN, delete anything that's there and type exactly what your provider's instructions say.
Leave the username and password fields blank unless instructed otherwise.
Restart your phone.

This single step clears up about a third of all "slow eSIM" complaints. Even if the APN was already filled in, deleting it and retyping it can kick-start a better connection.

2. Restart your device and toggle Airplane Mode

It sounds too simple, but a quick restart forces your phone to re-negotiate with the local network. After you land, your device might cling to a weak tower or a congested band. A restart clears that stale session.

Even faster, toggle Airplane Mode on and off. This also refreshes the network registration. On many eSIMs from providers like Roamless, Jetpac, or Instabridge, you'll often see speeds jump from barely usable to normal after a quick Airplane Mode cycle.

3. Switch networks manually

Travel eSIMs typically connect to a partner network in the country you're visiting. But sometimes your phone auto-selects a weak one when a stronger alternative is available. Most eSIMs allow manual network selection.

Try this:

Disable automatic network selection on your eSIM line (Settings > Cellular > your eSIM > Network Selection).
Wait for the list of available networks to populate.
Try each network listed. The one that lets you connect (with data) will probably be your eSIM's partner. If more than one works, pick the one with the strongest signal or a 4G/5G icon.

Nomad and Airalo data-only eSIMs often have agreements with two or even three local carriers in popular destinations. A manual switch can make the difference between 2 Mbps and 50 Mbps.

4. Your eSIM might be throttled

Here's the uncomfortable truth: some "unlimited" eSIM plans slow you down after you hit a daily cap. Holafly, for example, markets unlimited data on many plans, but fair-use policies apply. In 2026, many Holafly plans impose a soft cap of around 500MB to 1GB per day; after that, speeds drop to 1 Mbps or lower until the next 24-hour cycle. BNESIM and Maya Mobile also have high-data plans that throttle after a certain threshold, even if they're not labeled unlimited. If you bought a 10GB plan from Saily for $18 in Europe, you won't get throttled because it's a fixed amount, but heavy users on unlimited deals should check the fine print.

Check your provider's app or dashboard for any data usage alerts. If you're throttled, there's no workaround except waiting for the reset. Next time, if you need steady fast speeds for video calls, choose a finite data plan over an unlimited one.

5. Data saver and VPNs could be slowing you down

Your phone's built-in data saver mode and any VPN you're running add processing overhead. A VPN routes traffic through an encrypted tunnel, which adds latency and can reduce throughput, especially if the server is far away.

If your eSIM is already on the slower side due to network congestion, layering a VPN on top can make it feel broken. Disable the VPN temporarily as a test. Also, turn off data saver or low data mode for the eSIM line. On iPhones, Low Data Mode is under Cellular Data Options. On Android, Data Saver is in the network settings. Those features can cap background activity but may also throttle the download speeds you care about.

6. Your phone just can't keep up

Older phones lack certain 4G and 5G bands. An eSIM from aloSIM or Ubigi might connect to a network that uses a frequency your device doesn't support well. You then fall back to a slower band automatically. If you're using a phone from 2018 or earlier, check the bands your device supports against the local networks. In some Asian and European countries, carriers use Band 20 (800 MHz) for 4G, which many older US phones don't have. Result: weaker indoor coverage and slower speeds.

Even with a modern phone, check if 5G is enabled. Some eSIMs, like those from Nomad and Airalo, now offer 5G in 2026 at no extra cost. If you accidentally disabled 5G in settings, you might be stuck on congested 4G. Turn on 5G Auto or 5G On, but be aware 5G can drain battery faster. Also, a quick settings check: ensure data roaming is ON for the eSIM line. Travel eSIMs require roaming to be enabled, even if you're using a local IP address.

Common questions

I did everything. It's still slow. Is the eSIM provider bad?

Not necessarily. Congestion at a major airport or during a festival can hammer any network. Try moving a few blocks away. If speeds stay miserable everywhere, reach out to the provider's support. Airalo and Holafly have 24/7 chat that can sometimes switch your profile to a different local carrier or check for known outages.

Will a bigger data plan give me faster speeds?

No, the speed is not tied to the plan size. A 1GB plan from Saily and a 20GB plan from Yesim run on the same network with the same priority. The only exception is if the smaller plan is an old, cheaper promo that limits you to 4G while the bigger one includes 5G. Always compare plan details.

Are travel eSIMs slower than a local SIM?

Often, they're just slightly slower because your traffic may route through a gateway in another country, adding a few milliseconds of latency. But for maps, messaging, and browsing, you shouldn't feel a huge gap. If you do, the fixes above usually close it.

Bottom line

A slow travel eSIM is rarely a dead end. Start with the APN, restart, and manual network selection. Those three steps solve the vast majority of speed complaints. If you're still stuck, check for throttling, kill your VPN, and make sure your phone isn't a decade old. With providers like Airalo, Holafly, Nomad, Saily, aloSIM, and Ubigi all refining their eSIM profiles in 2026, slow data is almost always fixable. Next time you hit an unusably slow connection, run through this list. You'll be back to streaming and navigation before you finish your airport coffee.