Updated October 16, 2026 · NomadCue Editorial Team
Telefonica eSimFLAG vs ZenSim
Telefonica eSimFLAG
ZenSim
Higher score in this comparison
What sets them apart
| Compare | Telefonica eSimFLAGReviewSee alternativesSee alternatives | ZenSimReviewSee alternativesSee alternatives |
|---|---|---|
| Price from | Not confirmed | A$9 |
| Price per GB from | Not confirmed | $1.70 |
| Countries covered | Not confirmed | 200 |
| Hotspot sharing | Not confirmed | Yes |
| Reference plan prices | Not confirmed | Europe 10GB $23; US 10GB $21; Japan 10GB $17 (30 days, USD) |
| 5G | Not confirmed | Yes |
| Networks | Not confirmed | Au, NTT docomo, Rakuten Mobile, T Mobile |
| Top-ups | Not confirmed | Yes |
| Seller type | Not confirmed | Mvno |
| 10 GB in Europe | Not confirmed | $23 |
| 10 GB in the US | Not confirmed | $21 |
| 10 GB in Japan | Not confirmed | $17 |
We earn a commission when you sign up through links on this site. Partner status can affect where a brand appears in our rankings. Partners with a live offer in your country come first, then every other brand by score.
Our verdict on each
Telefonica eSimFLAG
The app terms identify Telefónica de España and Telefónica Móviles España as the eSimFLAG app providers.
ZenSim
ZenSim is a budget travel eSIM for short trips and long stays alike, covering 200 countries with 5G, hotspot sharing and instant activation on its main plans. Entry pricing starts at AUD 9, so it suits travellers who want broad coverage without a premium bill.
Score breakdown
| Area | Telefonica eSimFLAG | ZenSim |
|---|---|---|
| Cost | Not confirmed | 8.8Entry price of AUD 9 is low, but $1.70 per GB runs above the site median of €1.50. |
| Offer | Not confirmed | 9.2Coverage of 200 countries, 5G, hotspot sharing and instant activation under 5g, hotspot and instant activation make the offer broad. |
How they place
| Ranking | Telefonica eSimFLAG | ZenSim |
|---|---|---|
| Travel SIMs and eSIMs | 796 of 926 | 289 of 926 |
| Travel eSIMs | 796 of 918 | 296 of 918 |
Every fact side by side
| Fact | Telefonica eSimFLAG | ZenSim |
|---|---|---|
| Region | Not confirmed | Regional, Global |
| Features | Not confirmed | 5G, Hotspot, Instant activation |
| Pricing model | Not confirmed | Budget |
| Audience | Not confirmed | Short trip, Long trip |
| Legal entity | Not confirmed | ZenSim Pty Ltd |
| Headquarters | Not confirmed | Australia |
| Support channels | Not confirmed | Email, Chat, Help centre |
Where each stands against the rest
| Fact | Telefonica eSimFLAG | ZenSim | Median |
|---|---|---|---|
| Price from | Not confirmed | A$9below the median | A$20 |
| Price per GB from | Not confirmed | $1.70below the median | $2 |
| Countries covered | Not confirmed | 200highest quarter | 120 |
| 10 GB in Europe | Not confirmed | $23highest quarter | $12 |
| 10 GB in the US | Not confirmed | $21highest quarter | $15 |
| 10 GB in Japan | Not confirmed | $17highest quarter | $15 |
Median across 492 listed travel providers.
Pros and cons
Telefonica eSimFLAG
Pros
- The app terms identify Telefónica de España and Telefónica Móviles España as the eSimFLAG app providers.
ZenSim
Pros
- Covers 200 countries, with regional and global plans available
- 5G, hotspot sharing and instant activation are standard on the featured plans
- Top-ups let you add data without buying a new plan
Cons
- Price per GB of $1.70 is above the site median of €1.50
- Support runs on email, chat and help centre only, with no phone line listed
- Ranked 170 of 313 brands on price from, so cheaper entry points exist
Who each suits
Telefonica eSimFLAG
Who it suits
- Readers reviewing Telefónica eSimFLAG app terms
ZenSim
Who it suits
- Travellers on short trips who want data ready on arrival
- Long-stay visitors who plan to top up rather than buy one large plan
- Anyone comparing coverage per dollar across a long list of destinations
Who should look elsewhere
- Travellers who want unlimited data, since no unlimited claim is listed here
- Shoppers who want phone support, as only email, chat and help centre are offered
- Those chasing the lowest price per GB, where the site median is €1.50
Current offers
ZenSim
Current offer
Discount code
Top up discount: 10%
Top up plans are the same as the plans on the website except with a 10% discount
Source, checked September 26, 2026
Questions about each
ZenSim
How much do ZenSim travel eSIMs cost?+
Plans start at AUD 9. Reference regional pricing shows Europe at $23, the United States at $21 and Japan at $17. The full set is listed under Europe 10GB $23; US 10GB $21; Japan 10GB $17 (30 days, USD).
What does a ZenSim eSIM cost per GB?+
Price per GB starts at $1.70, which is higher than the site median of €1.50. ZenSim ranks 52 of 115 brands on this measure, so mid-range value is where it sits.
How many countries does ZenSim cover?+
Coverage stands at 200 countries, placing ZenSim 11 of 303 brands on countries covered. That is above the site median of 74, which makes breadth a genuine strength here.
Does ZenSim offer 5G and hotspot sharing?+
Yes to both. 5G and hotspot sharing are confirmed, and instant activation is also listed under 5g, hotspot and instant activation. The featured plans therefore cover the three features most travellers look for on a travel eSIM.
Other options to compare
Telefonica eSimFLAG
ZenSim