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Aland lslands（USD $）
Albania（USD $）
Andorra（USD $）
Australia（USD $）
Austria（USD $）
Belarus（USD $）
Belgium（USD $）
Bosnia and Herzegovina（USD $）
Bulgaria（USD $）
Canada（USD $）
China（USD $）
Croatia（USD $）
Cyprus（USD $）
Czech Republic（USD $）
Denmark（USD $）
Estonia（USD $）
Faroe Islands（USD $）
Finland（USD $）
France（USD $）
Germany（USD $）
Gibraltar（USD $）
Greece（USD $）
Guernsey（USD $）
Hong Kong SAR（USD $）
Hungary（USD $）
Iceland（USD $）
Ireland（USD $）
Isle of Man（USD $）
Italy（USD $）
Japan（USD $）
Jersey（USD $）
Latvia（USD $）
Liechtenstein（USD $）
Lithuania（USD $）
Luxembourg（USD $）
Macao SAR（USD $）
Macedonia,Former Yugoslav Republic of（USD $）
Malta（USD $）
Moldova（USD $）
Monaco（USD $）
Montenegro（USD $）
Netherlands（USD $）
Norway（USD $）
Poland（USD $）
Portugal（USD $）
Romania（USD $）
Russia（USD $）
San Marino（USD $）
Serbia（USD $）
Singapore（USD $）
Slovakia（USD $）
Slovenia（USD $）
Spain（USD $）
Svalbard and Jan Mayen（USD $）
Sweden（USD $）
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About ByteSIM

ByteSIM is built for better-connected journeys.

ByteSIM is a travel eSIM provider founded in 2022 and based in Hong Kong. We help travelers stay connected across 200+ countries and regions with flexible prepaid plans, including unlimited-data options, 5G access, multi-network coverage and local-number plans in 20+ destinations. Every journey is backed by 24/7 human support.

2022: Founded
200+: Destinations
24/7: Human support

Industry recognition Mobile Industry Awards 2026 Finalist Best eSIM Provider

Japan 5G plans available

United States Local-number options

Europe Regional coverage

Australia Unlimited data plans

ByteSIM

Active

Optimized roaming routes

Our story

Travel was moving again. Connectivity needed to catch up.

ByteSIM was built digital-first: no plastic SIM, no store visits, no waiting. Choose a plan, install it before you fly, land connected.

Traveler checking an eSIM connection while walking with a suitcase between global destinations

First ByteSIM eSIM October 19, 2022

The beginning

A simpler way to stay connected abroad.

In 2022, international travel was coming back, but staying connected abroad still meant airport SIM queues, tiny pieces of plastic and expensive roaming surprises.

Sunny Wong and Wilming Chou founded ByteSIM in Hong Kong so travelers could choose a plan online, install it before departure and connect on arrival. On October 19, 2022, ByteSIM delivered its first eSIM.

What began with one eSIM has grown into a global service built around one simple idea: wherever the journey takes you, getting connected should be the easy part.

Choose Online

Install Before departure

Connect On arrival

Our milestones

Five moments that shaped the journey.

2022 The first connection
ByteSIM was founded in Hong Kong and delivered its first eSIM on October 19, 2022.
2023 Connectivity in your pocket
The ByteSIM app launched on iOS and Android, putting plans and installation in one place.
2024 A local number, wherever you land
US plans launched with a real local phone number for calls and texts, running on the T-Mobile network.
2025 A step toward greener growth
Verified green electricity certificates became part of ByteSIM's effort to support more responsible long-term growth.
2026 - Present Recognized by the industry
ByteSIM was named a Mobile Industry Awards 2026 Finalist for Best eSIM Provider.

What we do

What ByteSIM does differently.

Useful beyond browsing

More Than Data

From booking a ride to calling family, selected plans can combine fast, low-latency connectivity with calls, texts, local numbers and hotspot sharing.

Calls and texts

Local numbers

Hotspot sharing

Local IP options

Built for heavier use

5G Unlimited Data

10x Faster than 4G

5G access Unlimited options Speed policy shown

More network options

Multiple Networks

Help when it matters

Real Human Support

<5 min Typical first response

24/7 online

180-Day Money-Back Guarantee Travel plans can change. Eligible purchases are covered by ByteSIM's 180-day money-back guarantee, subject to the refund policy.

View refund policy →

Plan features, 5G access, network availability and speed policies vary by destination and plan. Typical response time is based on recent support activity; actual times may vary.

Sustainability

Digital by design. Progress in practice.

ByteSIM is delivered digitally, without a plastic SIM, packaging or shipping. In 2025, we added a 1 MWh Green Electricity Certificate supporting documented solar generation.

Digital eSIM delivery No plastic SIM, packaging or shipping

1 MWh Green Electricity Certificate Representing documented solar generation in 2025

A practical step, not an end point. We will keep looking for measurable ways to reduce the impact behind every connection.