Unlimited eSIM throttling means your line drops to a fixed lower speed once the daily full-speed quota is used, then recovers when the quota resets 24 hours later. At 512 kbps you keep messaging, email and maps. At 1 Mbps music and standard-definition video usually play, and at 2 Mbps most video calls connect.
Key takeaways
- Every unlimited travel plan we read has two speeds: a daily high-speed quota and a reduced speed after it.
- The reduced speed is usually 512 kbps, 1 Mbps or 2 Mbps, and that single number decides which apps stay usable.
- Published quotas range from 1 GB a day on the TonMobile cards we read to 5 GB a day at Saily and on the Ubigi plan we checked.
- Airalo, Nomad and Ubigi count the 24 hours from activation, so the time you switch the plan on sets your daily reset.
What throttling means on an unlimited eSIM
Throttling on an unlimited eSIM is a planned speed reduction, not a fault and not a cutoff. The plan keeps you online for its whole validity, but only part of each day runs at full 4G or 5G speed.
Providers describe the rule in different words. You will see "fair usage policy", "daily high-speed data", "daily limit" or "reduced speed after X GB". All of them describe the same two-speed day, defined in our glossary of plan-card terms.
The rule comes from the networks themselves. Travel eSIM sellers resell data from local operators and do not run the towers, as TonMobile's terms state. The local operator sets how much heavy traffic a visiting line may push, and the eSIM seller passes that limit on as a daily quota.
Slow is not broken
A throttled line still has signal and still loads text. If nothing loads at all, the problem is usually the network, roaming setting or APN, not the fair usage policy.
512 kbps, 1 Mbps and 2 Mbps in plain terms
Each step up the ladder roughly doubles the bandwidth available after the cap. 512 kbps is half a megabit per second, 1 Mbps is twice that, and 2 Mbps is four times the slowest tier.
- 512 kbps
Messaging, email, maps, voice calls in apps
Hard: Video calls, streaming, big uploads
- 1 Mbps
Adds standard-definition video and music streaming
Hard: HD video, cloud photo backup
- 2 Mbps
Adds most video calls
Hard: 4K video, large downloads
- Full 4G/5G
Everything, including hotspot for a laptop
Hard: Only your daily quota
These bands are general guidance about common app needs, not figures any provider promises. A crowded cell, a weak indoor signal or a heavy web page can make a 1 Mbps line feel slower than its label.
The useful way to read the ladder is by your worst day. If you rarely pass the quota, the reduced speed barely matters. If you burn through the quota by lunch, the post-cap speed becomes your real plan for the rest of the day.
App by app: what works after the cap
Text-based apps survive any of the three speeds, while live video is where the tiers split. The table below is an approximate guide built on the general bands above.
| Use | 512 kbps | 1 Mbps | 2 Mbps |
|---|---|---|---|
| WhatsApp and Telegram messages | Yes | Yes | Yes |
| WhatsApp and Telegram voice calls | Usually | Yes | Yes |
| Email (text, small attachments) | Yes | Yes | Yes |
| Maps and navigation | Yes | Yes | Yes |
| Music streaming | Lower quality | Yes | Yes |
| SD video | Buffers | Usually | Yes |
| Video calls | Unreliable | Partial | Most |
| Photo backup, app updates | Very slow | Slow | Slow |
Messaging, voice notes and maps
WhatsApp and Telegram messages, voice notes and voice calls need little bandwidth, so 512 kbps normally carries them. Maps keep routing too, though fresh map tiles appear more slowly when you scroll to a new area.
Music and video
Music apps adjust quality to the line, so audio often keeps playing at 512 kbps with a drop in quality. Standard-definition video asks for more, and 1 Mbps is the point where it usually stops buffering.
Video calls and work
Video calls send and receive at the same time, which makes them the most demanding everyday task. Plan on 2 Mbps for most calls, or switch the call to audio when your line is throttled. If you share the connection with a laptop, read our guide to using an unlimited eSIM as a laptop hotspot first.
Daily quota and post-cap speed by provider
Providers differ on both numbers: how many gigabytes run at full speed each day and how fast the line is after that. The table uses each provider's own published wording, checked on 27 October 2026.
| Provider | Full speed per day | After the cap | Reset |
|---|---|---|---|
| TonMobile | 1 GB on the UK and Turkey cards we read | 512 kbps on those cards | Every day; check the card |
| Saily | 5 GB per 24 h | 1 Mbps | Every 24 h |
| Airalo | 3 GB per 24 h | 1 Mbps | 24 h from activation |
| Ubigi (Egypt plan) | 5 GB per day | 2 Mbps | At initial activation time |
| Nomad | 2 GB per day on most plans | About 1 to 2 Mbps | 24 h from activation |
| Holafly | Not published | Operator slowdown up to 1 day | Not stated |
TonMobile sits at the small-quota end on the cards we read: 1 GB at full speed, then 512 kbps. That suits maps, messaging and light browsing, and the short 1, 3 and 5 day plans keep a quick trip cheap. Limits can differ by country, so read the plan card in the TonMobile web app for your destination before you pay.
Saily and Ubigi publish the largest daily quotas at 5 GB, and Ubigi's 2 Mbps after the cap was the fastest slowdown speed we found. Airalo's 3 GB quota covers tethering too, because shared data counts toward the same 3 GB.
Destination matters as much as brand. Our country guides for the USA and for Europe, one country or regional show which plan types exist where. The full scoring sits on the provider rating page.
How to make the daily quota last longer
Most of a daily quota disappears in the background, not in the apps you open on purpose. Four habits keep more of it for the things you actually need.
Save backups for Wi-Fi
Turn off cellular photo backup and automatic app updates. A single burst of photo uploads can use a day's full-speed allowance in minutes.
Turn on Low Data Mode or Data Saver
iPhone Low Data Mode and Android Data Saver reduce background data use. On iPhone you can set it for the travel line alone and leave the home line untouched.
Activate in the morning
Airalo, Nomad and Ubigi reset the quota 24 hours from activation. Switching the plan on early in the day gives you a fresh quota each morning, not halfway through dinner.
Download before you go
Save offline maps, playlists and episodes on hotel Wi-Fi. Those files then cost nothing from the daily quota.
- Lower the default video quality in streaming apps.
- Turn off autoplay in social feeds.
- Keep the home SIM for bank SMS and let the travel eSIM carry data.
- Check how hotspot data is counted before sharing with a laptop.
Tip
If your usage is predictable, a fixed-gigabyte plan can cost less than unlimited. Our guide to how much data a month abroad takes helps you estimate it.
How to tell you have hit the cap
The clearest sign of throttling is a sudden, steady slowdown while the signal bars stay full. Pages that loaded instantly now take seconds, and video drops to low resolution or buffers.
Phone counter
Per-line usage
Your phone's mobile data settings count usage per line. Reset the counter when you install the eSIM so the number reflects only the trip.
Seller app
Plan status
Open the app or bot you bought from and check the plan details. The plan card also repeats the quota and the post-cap speed.
Clock
Reset time
Note the time you activated. On plans that reset 24 hours from activation, that time is when full speed returns.
If the line stays slow long after the reset time, restart the phone and toggle mobile data. A line that loads nothing at all points to a network or setup issue, which is worth raising with support.
We explain how quotas and slowdown speeds feed into each provider's score in how we score providers. For the full overview of plans, start with the best unlimited eSIM guide.
FAQ
Is 512 kbps enough on an unlimited eSIM?
512 kbps is enough for messaging, email and maps, and usually for WhatsApp or Telegram voice calls. Music plays at lower quality, while video and video calls struggle. Treat it as a backup lane, not a streaming speed.
What is the unlimited eSIM speed after the limit?
Unlimited eSIM speed after the limit depends on the provider and plan. Saily and Airalo publish 1 Mbps, Ubigi's Egypt plan shows 2 Mbps, Nomad states about 1 to 2 Mbps, and the TonMobile cards we read showed 512 kbps.
What is a fair usage policy on an eSIM?
A fair usage policy on an eSIM is the rule that limits full-speed data per day. After the daily high-speed quota, the line slows to a set speed until the next reset. The local network operator usually sets it.
When does the daily high-speed data reset?
Airalo, Nomad and Ubigi reset daily high-speed data every 24 hours counted from activation, not at midnight. Other providers state their own rules on the plan card, so check it before you activate.
Can I make a video call on a throttled eSIM?
Video calls on a throttled eSIM work best at 2 Mbps and are unreliable at 512 kbps. On a 1 Mbps line, expect partial success with lower picture quality. Switching to an audio call is the safer option after the cap.
Does hotspot use count toward the unlimited eSIM quota?
Hotspot use often counts toward the unlimited eSIM quota. Airalo counts tethering toward its 3 GB daily quota, and Holafly limits hotspot to 1 GB a day. Hotspot support also depends on the local carrier and the phone.