Planning a trip that includes both mainland China and Hong Kong? Whether you’re visiting Shanghai before flying to Hong Kong, traveling from Shenzhen into Hong Kong, or combining Beijing with Victoria Harbour, having reliable mobile internet throughout your journey makes traveling much easier.
Although Hong Kong is a Special Administrative Region (SAR) of China, mobile networks are different from those used in mainland China. Many travelers are surprised to discover that a mainland China SIM card may not automatically work in Hong Kong, and vice versa. Choosing a travel eSIM that specifically includes coverage for both destinations helps you avoid connectivity problems during your trip.
Instead of purchasing separate SIM cards after arriving in each destination, you can install one compatible regional eSIM before departure, keep your home SIM active and enjoy mobile data shortly after landing.
Quick answer: install your eSIM before departure, then enable it after landing by selecting it for Mobile Data and turning on Data Roaming.
Top China eSIMs
China eSIM
Fixed
1 GB, 7 days€ 10.382 GB, 15 days€ 19.473 GB, 30 days€ 26.82Unlimited
Unlimited, 1 day€ 9.95Unlimited, 3 days€ 28.55Unlimited, 5 days€ 46.72
Hong Kong (Special Administrative Region of China) eSIM
Fixed
1 GB, 7 days€ 3.462 GB, 15 days€ 5.623 GB, 30 days€ 7.79Unlimited
Unlimited, 1 day€ 3.89Unlimited, 3 days€ 9.95Unlimited, 5 days€ 16.01
Why Choose One eSIM for China and Hong Kong?
- One installation before departure.
- No physical SIM cards.
- No airport queues.
- No SIM swapping when crossing the border.
- Keep your home SIM card active.
- Perfect for Dual SIM smartphones.
- Automatic connection to supported local networks.
- Reliable mobile internet across both destinations.
How Does a China & Hong Kong eSIM Work?
An eSIM is a digital SIM profile built directly into compatible smartphones. After purchasing your plan, you’ll receive a QR code by email that installs your travel data plan while connected to WiFi.
After arriving in mainland China or Hong Kong, simply enable the eSIM, choose it for Mobile Data and turn on Data Roaming. Your device automatically connects to a supported local network included in your plan.
eSIM vs Buying Separate SIM Cards
| Feature | Regional eSIM | Separate SIM Cards |
|---|---|---|
| One purchase | Yes | No |
| One installation | Yes | No |
| Airport queues | No | Possible |
| Physical SIM required | No | Yes |
| Keep home SIM | Yes | Usually no |
| Automatic network switching | Yes | No |
Popular China & Hong Kong Itineraries
| Trip | Typical Length |
|---|---|
| Hong Kong → Shenzhen | 3–5 days |
| Hong Kong → Guangzhou | 5–7 days |
| Hong Kong → Shanghai | 7–10 days |
| Hong Kong → Beijing | 10–14 days |
| Grand China & Hong Kong Tour | 2–3 weeks |
How Much Data Do You Need?
| Trip Length | Recommended Data |
|---|---|
| 3–5 days | 5–10 GB |
| One week | 10–15 GB |
| Two weeks | 20–30 GB |
| Three weeks | 30 GB or more |
| Remote work | Unlimited or high-data plan |
What Can You Use Your eSIM For?
- Navigation.
- Translation apps.
- Hotel bookings.
- High-speed train reservations.
- Ride-hailing services.
- WeChat.
- Mobile payments.
- Social media.
- Video calls.
- Personal Hotspot.
Coverage
| Destination | Coverage |
|---|---|
| Hong Kong Island | Excellent |
| Kowloon | Excellent |
| Hong Kong International Airport | Excellent |
| Shenzhen | Excellent |
| Guangzhou | Excellent |
| Shanghai | Excellent |
| Beijing | Excellent |
| Major tourist attractions | Very Good to Excellent |
How to Activate Your eSIM
- Select your China & Hong Kong eSIM plan.
- Complete your purchase online.
- Receive your QR code instantly by email.
- Install the eSIM while connected to WiFi.
- Keep it disabled until your trip if preferred.
- After arrival, enable the eSIM.
- Select it for Mobile Data.
- Turn on Data Roaming.
Recommended Settings
| Setting | Recommended Value |
|---|---|
| Mobile Data | China & Hong Kong eSIM |
| Calls | Primary SIM |
| SMS | Primary SIM |
| Data Roaming | ON |
| Primary SIM Roaming | OFF |
| Automatic Data Switching | OFF |
| Network Selection | Automatic |
| APN | data.esim |
Travel Tips
- Install your eSIM before departure.
- Verify that your plan includes both mainland China and Hong Kong.
- Keep your QR code saved.
- Download offline maps.
- Carry a power bank.
- Install WeChat before visiting mainland China.
- Restart your phone after crossing the border if needed.
- Monitor your remaining data during longer trips.
Related Guides
- China eSIM Guide
- Hong Kong eSIM Guide
- Best eSIM for China
- Best eSIM for Hong Kong
- Buy Hong Kong eSIM
- How to Use a China eSIM
- How to Use a Hong Kong eSIM
- China eSIM APN Settings
FAQ
Can I use one eSIM in both mainland China and Hong Kong?
Yes, provided your eSIM plan specifically includes coverage for both mainland China and Hong Kong.
Does Hong Kong use the same mobile networks as mainland China?
No. Hong Kong has its own mobile operators, so you should choose an eSIM that explicitly supports both destinations.
Will my eSIM switch networks automatically?
Yes. When you enter the next supported destination, your phone automatically connects to a compatible local network.
Do I need Data Roaming enabled?
Yes. Enable Data Roaming on your travel eSIM. If manual APN configuration is required, use data.esim.
Can I keep my home SIM active?
Yes. Most Dual SIM smartphones allow you to keep your primary SIM active for calls and SMS while using your travel eSIM for mobile data.
Should I install my eSIM before flying?
Yes. Installing your eSIM before departure ensures you’re connected shortly after arriving in either mainland China or Hong Kong.
Final Recommendation
A China & Hong Kong eSIM is the simplest way to stay connected while traveling between mainland China and Hong Kong. You’ll avoid buying multiple SIM cards, enjoy seamless connectivity across the border and keep your home number active throughout your journey.
Install your eSIM before departure, enable Data Roaming after arrival and use data.esim if manual APN configuration is required.