eSIM
ByteSIM
Travel eSIM: daily plans, fixed volumes and unlimited 5G data
ByteSIM is a travel eSIM store that breaks down each destination into three formats: daily plans (500 MB/day, 1 GB/day), fixed volumes (Total 5 GB, 10 GB, 20 GB) and unlimited data on 5G networks where the destination allows it, along with extended regional packs (Europe 57 countries, Asia 26 countries, Global 109 countries).
Datadopt lists the active ByteSIM plans so you can compare volume, duration and price. The Discount code FJQLI1UGECOG is applied automatically via the Datadopt link at checkout.
All ByteSIM plans
Datadopt lists the active ByteSIM plans. Filter by destination, duration, volume and price. Each "Subscribe" button redirects you to ByteSIM with the Discount code FJQLI1UGECOG applied automatically via the Datadopt link.
The strengths of ByteSIM
Three formats per destination
Daily (500 MB/day, 1 GB/day), fixed total volume (5, 10, 20 GB) or unlimited data: each destination comes in the format that matches your usage.
Unlimited on 5G networks
Unlimited data offers backed by the 5G networks of partner operators on eligible destinations, including an unlimited Europe pack covering 57 countries.
Extended regional packs
Europe (57 countries), Asia (26 countries), US & Canada, Middle East, South America, Caribbean and a Global pack covering 109 countries on a single eSIM.
Accessible entry prices
The small daily plans start around $2.50: competitive positioning for short trips and light usage.
Support via WhatsApp
Customer support reachable directly on WhatsApp, in addition to email: handy for solving an installation issue while travelling.
Active Datadopt discount code
The Discount code FJQLI1UGECOG is applied automatically via the Datadopt link, valid on the ByteSIM catalogue.
Who is ByteSIM? A look at the operator
ByteSIM is a travel eSIM provider that covers around 200 destinations across some 250 products: single-country plans (Japan, United States, Thailand, Turkey…) and regional or global packs. Like most players in the market, ByteSIM is an MVNO that resells access to local partner operator networks, with 4G/5G speeds that depend on the network in use in each country.
ByteSIM's signature is the systematic breakdown of each destination into three formats: a daily plan where the volume renews every day (500 MB/day, 1 GB/day, 2 GB/day), a fixed total volume plan (Total 5 GB, 10 GB, 20 GB) and an unlimited data plan on 5G networks where the destination allows it. This volume × duration matrix explains the depth of the catalogue listed on Datadopt.
Multi-country packs are another strong point: Europe extends up to 57 countries on a single eSIM (including unlimited), Asia groups 26 countries, and the Global pack covers 109 countries for round-the-world trips and digital nomads. Added to this are zones less common among the alternatives: Caribbean, South America, Middle East, or the China / Hong Kong / Macau combo.
On the practical side, delivery is immediate: a QR code sent by email after payment, installation on eSIM-compatible iPhone and Android in a few minutes. Customer support is reachable by email and directly via WhatsApp, a welcome channel when you are already travelling. Payment is made in US dollars on the online store.
Is ByteSIM reliable? The service relies on established partner operators and displays a refund guarantee for unused eSIMs, with case-by-case handling in the event of a confirmed malfunction. Points to watch: the plans are data only (no calls or SMS), fair use applies to the unlimited and daily offers (reduced speed after the daily cap), and prices shown in dollars imply a conversion to euros at the time of payment.
ByteSIM reviews: what to take away?
Datadopt aggregates the ratings of the main review platforms (Trustpilot, App Store, Google Play) when they are available. In addition, here are the strengths and points to watch that emerge from our analysis of the ByteSIM service.
Trustpilot
4.8/5
3,985 reviews
App Store (iOS)
4.6/5
436 reviews
Google Play (Android)
4.4/5
2,116 reviews
Recurring strengths
- Three formats per destination (daily, fixed volume, unlimited): rare to find this systematic choice
- Extended regional packs: Europe 57 countries, Asia 26 countries, Global 109 countries on a single eSIM
- Competitive entry prices on daily plans (from around $2.50)
- Discount code FJQLI1UGECOG active via Datadopt on the ByteSIM catalogue
Points to watch
- Data-only plans: no calls or SMS included
- No dedicated management app: purchase and tracking go through the site and email
- Prices shown in US dollars: the amount in euros depends on the exchange rate at payment
- China: a VPN installed before departure remains essential to access Google, WhatsApp and Instagram (as with all providers)
Our analysis: ByteSIM is a relevant choice for travellers who want to finely tune the plan format to their usage (daily, fixed volume or unlimited) and for multi-country itineraries thanks to its extended regional packs. For a mature app ecosystem, Airalo remains a safe bet; for long-term unlimited with 24/7 multilingual support, Holafly is the reference alternative.
ByteSIM coverage: where do the plans work?
ByteSIM covers around 200 destinations in country plans, regional packs (Europe 57 countries, Asia 26 countries, US & Canada, Middle East, South America, Caribbean) and a Global 109-country pack. Here are the destinations most searched by travellers, with a direct link to the matching ByteSIM plans.
Popular destinations covered
⚠️ Watch out for China
China blocks Google, WhatsApp, Instagram, Facebook, YouTube and a large part of the Western web (Great Firewall). The ByteSIM eSIM for China relies on a local operator, so the blocking applies. To access your usual services, install a VPN before departure (NordVPN, ExpressVPN, ProtonVPN, Mullvad): once you arrive in China, the VPN download sites are themselves blocked.
eSIM guides by destination
ByteSIM plan types
Daily plan
A volume that renews every day (500 MB/day, 1 GB/day, 2 GB/day) over the chosen duration. Once the daily cap is reached, the speed is reduced until the next day.
Total volume plan
A fixed overall volume (Total 5 GB, 10 GB, 20 GB) to use over the validity period. The classic format, economical for controlled usage.
Unlimited 5G plan
Unlimited data on the 5G network of partner operators, available on eligible destinations and on the Europe 57-country pack. Fair use applies.
Regional and Global pack
A single eSIM for a whole region (Europe, Asia, the Americas, Middle East, Caribbean) or for 109 countries with the Global pack: ideal for multi-country itineraries.
ByteSIM FAQ
How do I activate a ByteSIM eSIM?▾
After payment, ByteSIM sends a QR code by email. iPhone: Settings → Cellular → Add eSIM → scan the QR. Android: Settings → Network & internet → SIM → Download a SIM. Install the eSIM before departure and turn on data on arrival: validity starts at the first connection to the destination network.
Does ByteSIM offer a discount code?▾
Yes, the Discount code FJQLI1UGECOG is active via Datadopt and applies automatically when you click "Subscribe" from our comparator: the code is built into the link, no manual entry is needed at payment.
What is the difference between a daily plan and a total volume plan at ByteSIM?▾
The daily plan (500 MB/day, 1 GB/day) renews its volume every day: once the daily cap is used up, the speed is reduced until the next day, at no cost. The total volume plan (Total 5 GB, 10 GB…) offers an overall allowance to use freely over the validity period. The daily plan is reassuring for regular usage, the total volume is often more economical for occasional usage.
Does ByteSIM offer unlimited data?▾
Yes, on eligible destinations, ByteSIM offers unlimited data plans backed by the 5G networks of partner operators, including an unlimited Europe pack covering 57 countries. Fair use applies: the speed may be temporarily reduced after very intensive usage.
Does ByteSIM work in China?▾
Yes, ByteSIM covers mainland China as well as a China / Hong Kong / Macau combo, but Google, WhatsApp, Instagram, Facebook and YouTube are blocked by the Great Firewall even via ByteSIM. Install a VPN (NordVPN, ExpressVPN, Mullvad) on your phone BEFORE departure: once on site, the VPN download sites are themselves blocked.
Can I use WhatsApp, TikTok and tethering with ByteSIM?▾
WhatsApp and TikTok: yes, on all destinations (except China without a VPN). Tethering (hotspot): allowed on most ByteSIM plans; any limits are shown in the plan details on Datadopt.
Does ByteSIM refund in the event of a problem?▾
ByteSIM displays a refund guarantee for unused eSIMs. After activation, handling is case by case in the event of a confirmed malfunction. Support is reachable by email and via WhatsApp: contact it quickly with the details of the problem and always test the connection as soon as you arrive.
ByteSIM or Holafly: which to choose?▾
ByteSIM = choice of format (daily, fixed volume or unlimited 5G) on each destination, extended regional packs and Discount code FJQLI1UGECOG via Datadopt. Holafly = systematic unlimited data, 24/7 multilingual support and premium positioning for long stays. If you want to control your budget with a small volume, ByteSIM is more flexible; for intensive streaming without counting, Holafly remains the reference.
Is my phone compatible with ByteSIM?▾
iPhone XS and later (2018+), Samsung Galaxy S20 and later, Google Pixel 3+, Xiaomi 13+ and most recent eSIM-compatible models. Check for the "EID" field in Settings → General → About (iPhone) or in the SIM settings (Android). See our complete eSIM smartphone compatibility guide for the detailed list of models.
What is the speed of ByteSIM data?▾
It depends on the local partner operator: 5G on compatible destinations and plans (including the "5G Network" unlimited offers), 4G/4G+ in most cases. On daily plans, the speed is reduced once the day's volume is used up. The network in use is shown on each plan's listing on Datadopt.
Alternatives to ByteSIM
Depending on your usage and budget, several alternatives may be a better fit:
Airalo
The market's historical reference: a very mature app, 200 destinations and a long-established community of users.
See the page Airalo →
Holafly
Truly unlimited data across the board with 24/7 multilingual support: the reference alternative for long stays and intensive streaming.
See the page Holafly →
Saily
By NordVPN: built-in security features (web protection, tracker blocking) and a polished app to manage your plans.
See the page Saily →
RedEx
A similar profile: daily plans and a very deep catalogue, with particularly dense Asian coverage.
See the page RedEx →
Useful Datadopt guides
Transparency about our links
Datadopt is a ByteSIM partner. Some links on this page are sponsored links (affiliate): when you subscribe to an offer from Datadopt, we receive a commission at no extra cost to you. This mechanism entirely funds the upkeep of the comparator, the editorial enrichment of the pages and the aggregation of reviews. Our recommendations remain independent: we also list the alternatives to ByteSIM (Airalo, Holafly, Saily, RedEx) and flag the points to watch for each provider.
🎁 ByteSIM discount code
Exclusive Datadopt benefit
FJQLI1UGECOGApplied automatically via the Datadopt link
Go to ByteSIM →Valid on the ByteSIM catalogue • Datadopt partner link