eSIM Data Is Slow or Throttled?

Check your APN settings

A wrong APN is the most common cause of slow eSIM data. iOS: Settings → Cellular → Cellular Data Network (scroll to bottom). The APN field should match your provider's recommended value. LTE.app Smart Coach checks and corrects this automatically.

Try a different carrier manually

In congested areas (airports, stadiums, tourist spots), switching to a less-congested carrier can double your speed. iOS: Settings → Cellular → Network Selection → Automatic off → try each listed carrier and run a speed test.

Turn off and on data roaming

Toggle data roaming off, wait 10 seconds, then back on. This forces a fresh carrier registration which can reset throttling applied to stale sessions.

Restart your device completely

A full restart re-initialises the modem and clears cached carrier configuration. Hold power + volume down → restart. Wait 2 minutes for carrier registration before testing speed again.

Check your plan data remaining

Many plans throttle to 128kbps or 512kbps after the high-speed data allowance is used. Check remaining data in your LTE.app dashboard. If exhausted, purchase a top-up — no new eSIM needed.

Use Smart Coach for automatic diagnosis

Open LTE.app and tap Smart Coach. It checks your APN settings, roaming state, and carrier connection automatically — even without mobile data — and walks you through the exact fix for your device and carrier.

Why is my eSIM so slow when I have full bars?

Full signal bars indicate carrier connection, not data speed. APN misconfiguration, carrier throttling after hitting a data cap, or being on a congested tower in a tourist area all cause slow speeds despite strong signal. Check APN settings first.

Will switching carriers improve eSIM speed?

Yes, in many cases. Multi-network eSIM plans have access to several carriers in each country. If one is throttled or congested, switching manually to another often restores full LTE speeds.

How do I know if my eSIM plan has been throttled?

Throttled plans typically show consistent speeds below 1 Mbps regardless of location or time. Check your remaining data in the LTE.app app — if you have used all high-speed data, you are on the throttled tier. A top-up restores full speed.