Built by telecom people.
Not marketers.
Most eSIM apps are travel startups reselling someone else's network. DataSIM comes from 25+ years inside the telecom industry — and it shows in every connection.
Our story
DataSIM is operated by ZEUST LIMITED, a telecommunications company founded in Cyprus and built on more than 25 years of hands-on telecom experience — from wholesale VoIP and carrier interconnection to consumer mobile apps used around the world.
Before DataSIM, we built Fanytel, a virtual number and calling platform serving users in 90+ countries. Across our products, we've reached 6M+ app downloads and hundreds of thousands of active users worldwide.
When we saw travelers overcharged for roaming and underserved by eSIM apps with no real telecom backbone, we built the product we'd want to use ourselves: honest pricing, premium networks, and support that actually answers.
25+ years in the making
From carrier infrastructure to the eSIM in your pocket.
Telecom roots
Our team starts in wholesale VoIP and carrier interconnection — building and operating the networks other companies only resell.
ZEUST founded in Cyprus
We launch as a European telecommunications company focused on app-based global communication products.
6M+ downloads worldwide
Fanytel and our family of apps connect hundreds of thousands of active users across 90+ countries.
DataSIM — travel data, done right
Instant eSIM data in 190+ countries, on premium networks, from $0.90/GB — backed by everything we've learned in telecom.
Why our eSIM is different
The difference between reselling connectivity and understanding it.
Telecom DNA
We're not a travel app that bolted on connectivity. We're a telecom operator with 25+ years of carrier relationships and infrastructure know-how.
Premium networks only
Tier-1 eSIM infrastructure and high-quality local networks in every destination — your data works at the airport, the hotel, and everywhere between.
Honest, smart pricing
From $0.90/GB with no hidden fees, no contracts, no surprises. You pay for data — not for our marketing budget.
Real 24/7 support
Talk to people who understand networks — not a chatbot reading a script. We've supported telecom customers around the clock for over a decade.
Our promise to travelers
Choose your destination, install your eSIM, and land connected — no SIM swaps, no eKYC paperwork, no roaming shock when you get home. If anything ever goes wrong, we're one message away at support@data-sim.app, any hour, any time zone.
Travel connected. Travel smart.
Join hundreds of thousands of travelers who trust DataSIM for fast, affordable data in 190+ countries.