Esimflag eSIM – Review & Full Test 2025

🌍

Countries covered

170 countries

💶

Starting at

3,40 €

📶

Network

5G

📊

Data

Unlimited

❌

Calls/SMS

No

📱

App

iOS & Android

Coverage in 170+ countries with unlimited 4G/5G high-speed data.

A single rechargeable eSIM for all your future travels.

Automatic activation without intervention on arrival.

Responsive 24/7 customer support via chat and WhatsApp.

Easy refund if incompatibility or non-activation.

Official ratings

Destinations & coverage

eSIMflag covers more than 170 worldwide destinations with unlimited data, especially strong in Europe and the Americas, through reliable local partners.

By region

Key points

✅

Advantages

  • ✓ Unlimited data without fear of running out.
  • ✓ Clear daily prices starting at €3.4.
  • ✓ Quick installation in 2 minutes via app.
  • ✓ Hotspot/tethering allowed on compatible devices.
  • ✓ Reliable network with Telefónica local partners.
⚠️

Disadvantages

  • ✗ Data-only, no calls/SMS included.
  • ✗ Maximum duration 30 days per plan.
  • ✗ Coverage varies by local partners.
  • ✗ Recent app with potentially fewer reviews.
  • ✗ Daily price may increase depending on destinations.

Customer reviews

Google Play

4/5

“

Installation in 2 minutes, perfect unlimited data for Spain and France, quick support via WhatsApp.

December 1, 2025

App Store

4/5

“

eSIM auto-activated on arrival in the USA, smooth hotspot for family, excellent value for money.

November 1, 2025

Google Play

4/5

“

Reliable unlimited data Thailand-Japan, no surprise roaming, recommended for short trips.

October 1, 2025

Description

eSIMflag, backed by Telefónica, offers unlimited data-only eSIMs starting at €3.4 per day for 170+ countries. Ideal for short stays or multi-destination trips in Europe and beyond, with a single rechargeable eSIM, automatic activation on arrival, tethering allowed, and refund if issues. Perfect for busy travelers seeking simplicity and reliable high-speed without changing physical SIMs.

How it works

Confirm that your smartphone supports eSIM (iPhone XS+, Samsung S20+, etc.).

Install from App Store or Google Play.

Select country, travel days (1-30), and number of users.

Confirm with card or Apple/Google Pay.

Scan displayed QR code with internet connection.

eSIM automatically connects to local network.

Top-up the same eSIM for future trips.

⚠️ If it fails

✅ Check compatibility, stable connection, and restart. Contact 24/7 chat.

✅ Enable mobile data/roaming, airplane mode on/off, restart.

✅ Check card details, authorize international payments, try another method.

Alternatives

FAQ

Choose 7-15 days unlimited at ~€5/day for multi-country city trips in the EU, covering France, Spain, Italy, etc.

Yes, tethering is allowed on most compatible devices, ideal for sharing with tablet or laptop.

Yes if iPhone XS+, Galaxy S20+, Pixel 4+, etc. Check the official list on eSIMflag website.

Yes if not activated, incompatible, or technical problem. Contact support 24/7 via chat/WhatsApp.

Via app or web, add days/data on the same eSIM without reinstalling.

No, unlimited data-only. Keep physical SIM for voice/SMS.

Local 4G/5G partners for the best speed (e.g., Movistar in Spain).

Company info

Legal name: Telefónica

Email: [email protected]

Website: https://www.esimflag.com

Support

24/7

chat, whatsapp

Accepted payments

Visa, Mastercard, Apple Pay, Google Pay

Platforms

iOS app, Android app, Web

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