Why is my eSIM data so slow even though I still have data remaining?

Several things can cause slow speeds: network congestion in busy areas, connecting to a slower network, VPN interference, or being in an area with weak coverage. Try switching to a different carrier via manual network selection and disabling any VPNs.

Does Only eSIM throttle data speeds after a certain amount of usage?

Some plans include a high-speed data allowance after which speeds are reduced rather than cut off entirely. Check your specific plan details on your order page to see if a fair use policy applies.

Can a VPN make my eSIM data slower?

Yes. VPNs route your traffic through remote servers, adding latency. They can also conflict with eSIM data routing in some countries. Try disabling your VPN to see if speeds improve — you can always re-enable it once you've confirmed the issue.

Data is Slow or Not Working — Troubleshooting Steps

Slow Data vs. No Data

If your eSIM is connected and data is technically working — pages load, apps sync — but everything feels painfully slow, the troubleshooting approach is different from a "no connection" situation. Slow data usually points to a network issue, a settings conflict, or a data limit you've hit.

Here's how to diagnose and fix it.

Step 1: Check Your Data Allowance

The most common reason for suddenly slow data is that you've used up your high-speed allowance.

Log in to your account at onlyesim.com
Go to your active plan and check the remaining data balance
If you're at or near zero, your data may be throttled or stopped

Some plans offer reduced-speed data after the high-speed allowance runs out, rather than cutting you off entirely. If you've hit your limit, you can purchase a top-up or a new plan.

Step 2: Try a Different Network

Not all networks perform equally. The carrier your phone auto-selected might have congested towers in your area, or it might only be offering a slower connection type.

Go to your eSIM's network selection settings
Turn off Automatic network selection
Wait for the list of available carriers to load
Select a different carrier from the list
Test your speed

You might need to try 2-3 different carriers to find one with better throughput. Once you find a fast one, you can stay on manual selection or switch back to automatic.

Step 3: Change Your Location

This sounds low-tech, but it matters. Mobile data speeds depend heavily on your physical position relative to cell towers.

Indoors: Building materials (concrete, metal roofing) block signal. Move near a window or step outside.
Crowded areas: Tourist hotspots, stadiums, and transit hubs experience heavy network congestion. Speeds often improve by walking a block or two away.
Rural areas: Coverage may be limited to slower network bands. Speeds should improve as you get closer to populated areas.

Step 4: Disable VPN

If you're running a VPN, try turning it off temporarily.

VPNs add latency by routing your traffic through a remote server — sometimes one that's geographically far from where you are. In some countries, VPNs can also interfere with the way eSIM data is routed, causing connections to stall or slow down significantly.

Turn off the VPN, test your speed, and see if things improve. If they do, you've found the culprit. You may be able to reconnect to a VPN server closer to your location for better performance.

Step 5: Restart Your Phone

A restart clears temporary network glitches and forces your phone to establish a fresh connection.

Power off completely
Wait 10 seconds
Power back on
Wait 1-2 minutes for the network to reconnect

This is especially worth trying if data has been slow since you first connected — it may clear up a suboptimal initial connection.

Step 6: Check APN Settings

Incorrect or missing APN (Access Point Name) settings can cause slow or unreliable data even when you have a network connection.

On iPhone: Go to Settings > Cellular > tap your eSIM plan > Cellular Data Network. If the APN field is blank or incorrect, enter the APN from your setup email.

On Android: Go to Settings > Network & Internet > SIMs > tap your eSIM > Access Point Names. Verify the APN matches what was provided in your order.

Most Only eSIM plans configure APN automatically, so this is only a factor if the other steps haven't helped.

A Note on Fair Use Policies

Some data plans include a fair use policy. This means you get a set amount of high-speed data (for example, 5 GB at 4G/LTE speeds), and after that, your connection is throttled to a lower speed for the remainder of your plan's validity period.

If you suspect this is happening, check your plan details on your order page. If you need more high-speed data, purchasing a top-up is the quickest fix.

Still Experiencing Slow Speeds?

If you've tried all the steps and speeds remain unusable, let our support team know. Include your order number, your current location, and a description of the speeds you're seeing. We can check network status on our end and suggest alternative solutions.