When Unlimited eSIMs Are Not Worth It (2026)

The Math: Fixed vs Unlimited

For a 7-day Japan trip, here’s the actual price breakdown across major providers (verified April 2026):

Unlimited plans cost 2.5–2.7x more than fixed plans for the same trip. For a traveler using 3–5 GB total, a fixed plan delivers full speed throughout at one-third the price.

The flip happens around 15–20 GB per trip. Above that, unlimited plans pull ahead — but only if you’re actually using the data, and only if you don’t hit the FUP throttle.

What “Unlimited” Really Means

Almost every “unlimited” travel eSIM throttles after a Fair Usage Policy threshold. The data volume is unlimited; the high-speed allowance is not.

Here’s what each major provider’s “unlimited” actually means:

• Airalo — full speed up to 3 GB/day, then throttled to 1 Mbps until reset. Threshold published.
• Saily — full speed up to 5 GB/day, then throttled to 1024 Kbps until reset. Threshold published.
• Nomad — full speed up to 2 GB/day, then throttled to 512 Kbps until reset. Threshold published.
• Ubigi — full speed for 15–25 GB total per plan, then throttled to 2 Mbps. Threshold published per plan.
• Holafly — throttle threshold not publicly disclosed for most countries (~90 GB/month soft cap referenced for some regions). Throttled speed: 256–1024 Kbps.

For a deeper dive on Holafly’s transparency specifically, see Is Holafly truly unlimited?.

When Fixed Plans Win

Fixed-data plans (1 GB, 5 GB, 10 GB, etc.) win for the majority of travelers. Specifically:

You’re a casual traveler. Maps, messaging, social media, occasional photo uploads. Typical usage: 1–3 GB/day. A 5 GB plan covers a full week comfortably with hotel and café Wi-Fi for heavier tasks. Cost: $8–12 for 5 GB / 30 days across major providers.

You can estimate your usage roughly. If you have any sense of whether you’ll use 5 GB or 20 GB on a trip, fixed plans give you full speed for whatever you choose. Going slightly over with a top-up is almost always cheaper than buying unlimited upfront.

You’re going somewhere with cheap fixed plans. Thailand, Vietnam, Spain, Italy all have fixed 5 GB plans at $8–11. Buying unlimited at $20–30 for the same trip is overpaying by 2–3x.

You’re traveling 3–14 days. This is the sweet spot for fixed plans. Short enough that 5–10 GB covers normal use, not long enough to need monthly subscriptions.

You want predictable speeds. Fixed plans run at full network speed for the entire allowance. No mid-trip throttle surprise.

When Unlimited Actually Wins

Three real scenarios where unlimited beats fixed:

1. You’re a heavy data user. Streaming video on your phone, hotspotting your laptop, video-calling family every day. Typical usage: 8–15 GB/day or more. At this volume, a 20 GB fixed plan runs out in 2–3 days. Unlimited (with FUP) becomes cheaper than buying multiple top-ups.

2. You hate thinking about data. Some travelers don’t want to estimate. They want a flat per-day price and they want it to “just work.” Holafly sells exactly this convenience — the price premium is what you pay to never check your data balance.

3. You’re staying 14+ days at heavy usage. A 14-day Holafly plan ($50.90) starts to look reasonable when the alternative is buying multiple Airalo top-ups across the same window. For 30+ days at heavy use, Ubigi’s monthly subscription at $18–36/month is often the best value.

For lighter long-stay travelers (30+ days using moderate data), fixed plans still win — Travelsim Asia’s 50 GB / 180 days at $49.99 beats a month of Holafly at $74.90.

The honest framing: unlimited is a convenience product, not a value product.

Cheapest Fixed-Plan Alternatives by Destination

For each major destination, here’s the cheapest fixed 5 GB plan as a fixed-plan baseline alternative to unlimited:

Compared to a $27.30 Holafly 7-day unlimited, every fixed 5 GB option above saves $14–19 for the same week of typical use.

Frequently Asked Questions

Are unlimited eSIM plans really unlimited?

No. Almost every “unlimited” travel eSIM includes a Fair Usage Policy that throttles speeds after a daily or monthly cap. Airalo throttles to 1 Mbps after 3 GB/day. Saily throttles to 1024 Kbps after 5 GB/day. Nomad throttles to 512 Kbps after 2 GB/day. Holafly throttles to 256–1024 Kbps after an undisclosed threshold (~90 GB/month soft cap referenced).

How much data does the average traveler actually use?

For a 7-day trip with maps, messaging, social media, and occasional video calls: typically 5–7 GB total (about 1 GB/day). Heavy streamers and hotspot users can use 15–30 GB on the same trip. See our individual destination guides for country-specific data needs.

When is unlimited worth it?

Three scenarios: (1) You use 8+ GB/day consistently — heavy streaming, hotspot, or video calling. (2) You strongly prefer flat per-day pricing without estimating usage. (3) You’re on a 14+ day trip at heavy usage where multiple fixed-plan top-ups would cost more than unlimited.

What’s cheaper, a 5 GB fixed plan or a 7-day unlimited plan?

A 5 GB fixed plan is almost always cheaper. For Japan, fixed 5 GB plans start at $10–11 / 30 days. Unlimited 7-day plans start at $27.30 — about 2.7x more expensive for similar usage on a typical trip.

Can I top up a fixed plan if I run out?

Yes. Most providers (Airalo, Saily, Nomad, Travelsim Asia) support top-ups via app or web portal. Top-up activation usually takes 2–5 minutes. Buying a slightly larger plan upfront is typically cheaper than topping up mid-trip, but the option exists.

Which provider has the most transparent unlimited plans?

Airalo, Saily, and Nomad all publish their exact daily throttle thresholds. Holafly does not publish daily thresholds for most countries — only a referenced ~90 GB/month soft cap in some regions. For deeper detail on Holafly’s FUP transparency, see our Is Holafly truly unlimited? guide.