In short: The best eSIM for China is one that routes your traffic out of the country through an international gateway. This bypasses the Great Firewall, allowing apps like WhatsApp, Google Maps, and Instagram to work without any configuration. While price and data allowance are important, the deciding factor is actual access to your apps.
Choosing an eSIM for China isn't just about gigabytes or finding the cheapest rate. The question that truly impacts your trip is: will you be able to open WhatsApp, Google Maps, and Instagram when you land? China blocks a significant portion of the Western web with the so-called Great Firewall, and that's where a well-chosen eSIM makes the difference between staying connected or struggling with your phone every morning. In this guide, we'll explain what to really look for, the difference between an eSIM that routes traffic outside of China and one that doesn't, how much data you'll need, and how to get everything activated before you fly. The idea is simple: land with internet access, no roaming, and no stress.
What makes an eSIM "the best" for China
For almost any destination in the world, coverage and price are the main concerns. You buy data, you land, it connects to the local network, and you're good to go. China is the big exception. Internet censorship comes into play here, so a cheap eSIM that connects to the local network "as is" will leave you without your usual apps, no matter how strong your signal is.
The best eSIM for China, therefore, is one that routes your traffic outside the country. By connecting through an international gateway, your data "exits" to the internet from outside China, the Great Firewall doesn't affect you, and apps like WhatsApp, Google, or Instagram work as they do at home. That's the decisive factor. Price and gigabytes come next, once you've guaranteed the first point.
Searches confirm this: many people directly type "eSIM with VPN for China" because they intuit that the problem isn't the signal, but access. The general recommendation is clear: prioritize a solution that already solves the firewall issue out of the box, and as a backup, have a reliable VPN installed before you leave. If you want to delve deeper into the privacy and secure networks aspect, we have a dedicated guide on eSIM, VPN, and travel privacy that complements what you'll see here very well.
The Great Firewall: what's blocked and what's not
The "Great Firewall" is the system China uses to filter access to numerous foreign services. It's not a rumor or traveler exaggeration; it's a real and established network policy. In practice, without an adequate solution, you'll be without much of your usual digital life.
These are the services that typically do not work within mainland China without a solution to bypass the wall, compared to the local alternatives that do operate normally:
| Usually blocked | Works normally |
|---|---|
| Google (search, Maps, Gmail, Drive) | Baidu (Chinese search engine) |
| Instagram and Facebook | |
| YouTube | Youku / Bilibili |
| X (Twitter) and Telegram | Local map apps (Amap, Baidu Maps) |
The nuance that almost no one explains is this: the blocking depends on where your internet connection "exits," not on your phone. If your data exits from within China, the firewall applies to you. If your eSIM routes traffic through a server outside the country, you browse as if you were in Hong Kong or Europe, and your apps work. It's exactly the same principle by which a VPN "fools" the wall, only with a good eSIM, it's already solved without you having to do anything.
Important for your trip: have your VPN downloaded and tested before you fly. Many VPN websites and stores are blocked within China, so if you don't already have it installed, it will be difficult to get once you're there. Prevention is better than cure.
eSIM with international exit or eSIM + VPN: the key difference
There are two ways to browse freely in China, and it's important to distinguish them clearly because they are not the same, although they are sometimes conflated in conversations.
- eSIM that routes outside China: Your traffic goes through an international gateway, so the firewall doesn't affect you and your apps connect directly. This is the most convenient option: install, activate, and use. You don't rely on any external app to bypass censorship in real time.
- Local eSIM + VPN: You connect to the Chinese network and use a VPN to "jump" the wall. This works, but it depends on the VPN's ability to withstand blocks, which in China are particularly aggressive and change frequently. There are good days and days when certain servers stop responding.
For most travelers, the first option is more reliable because it doesn't delegate access to software that has to play a cat-and-mouse game with censorship every time you open your phone. Even so, the most robust combination is a good eSIM with international exit and a backup VPN installed: if one method fails, you have the other. Inexpensive redundancy for something you don't want to fail 9,000 km from home.
What about my Spanish operator's roaming?
Traditional roaming in China is usually expensive and, what's more, it doesn't guarantee that you can use your apps, because often traffic follows routes that are subject to filtering. It can cost several euros a day with very limited usage. If you're used to classic roaming, you'll see that eSIM completely changes the rules of the game. For a very short emergency getaway, it might be fine, but for a real trip, it's not the move.
Comparison: options for connecting in China
This table summarizes the common paths and who each one is suitable for. The conclusion is that, in China, convenience and reliability outweigh saving a few euros.
| Option | Access to Western apps | Convenience | For whom |
|---|---|---|---|
| eSIM with international exit | Yes, direct | High (install and use) | Tourists and business travelers |
| Local eSIM + own VPN | Depends on the VPN | Medium (requires configuration) | Technical users with a reliable paid VPN |
| Spanish operator's roaming | Variable and expensive | Low | Very short emergency stays |
| Local Chinese SIM | No (subject to firewall) | Low (passport registration) | Long stays with local apps |
Our eSIM for China is designed precisely for the first scenario: exiting through an international gateway so you don't have to worry about the wall. And if your route includes a stop in Hong Kong, keep in mind that the internet there is open, so you might only need the "with wall" solution for your days in mainland China. We detail this in our guide to eSIM for Hong Kong.
Are you traveling to more countries in the area?
If China is just one stop on a broader itinerary through Asia, you might find a regional plan more convenient than buying destination by destination. For routes combining China with Japan and Korea, there's the eSIM for China, Japan, and South Korea, which covers all three countries with a single profile. And for a broader view of the continent, check out our comparison of the best eSIMs for Asia before deciding.
How many GB do you need for a trip to China
Data consumption in China is similar to any trip, with a small extra: if you use a VPN, encryption adds some overhead, because each data packet travels wrapped in a layer of security. It's not dramatic, but it's good to have a bit of leeway if you're going to use the VPN a lot. These figures serve as a reference depending on the number of days and your type of usage.
| Duration | Light use (maps, messaging) | Intense use (video, social media, uploading photos) |
|---|---|---|
| 1 week | 3-5 GB | 8-10 GB |
| 2 weeks | 8-10 GB | 15-20 GB |
| Long stay (month or more) | Rechargeable monthly plan | Large monthly plan or recharge |
Practical tip: use the hotel Wi-Fi for large downloads and long video calls, although it's advisable to also have the VPN active on those networks, as the firewall affects any connection within the country, including the hotel's. To fine-tune the calculation according to your actual habits, it will help to read how much data you need for travel, where we break down consumption by type of use so you don't run short or overpay.
What almost no one tells you about connecting in China
Here are the details that usually don't appear in standard guides and that make the difference between a smooth trip and a week struggling with your phone:
- Download your offline maps and translator before you fly. Even if your eSIM routes traffic out of the country, having Google Maps offline and a downloaded translator will save you on the subway, in rural areas, or when the connection is weak. It's your safety net.
- SMS verification codes are key. Many banks and apps send you an SMS upon landing. That's why it's advisable to keep your Spanish SIM active as a second line just for calls and SMS, while the eSIM handles data.
- Chinese public Wi-Fi often requires a local number to register. This is another reason not to rely on free Wi-Fi and to carry your own data: you avoid uncomfortable registrations with your passport or a number you don't have.
- Activate the VPN even in the hotel. Many people assume that hotel Wi-Fi "is different." It's not: it's still within China and still filtered. If your eSIM already routes traffic out, use data for important things.
- Don't wait until you're there to resolve doubts. Installing and testing the eSIM from home, with your Wi-Fi, allows you to detect any problems while you still have time to fix them. Everything is harder on the ground.
- Paying in China is a whole different ball game. WeChat Pay and Alipay dominate the country. Having stable data allows you to set them up and use them, which is almost essential even for small purchases.
How to activate your eSIM for China step by step
Installation takes about a minute and is done from home before flying, with the added advantage that you also get the backup VPN ready and check that everything works in advance.
- Purchase the plan and receive the QR or activation code by email.
- Using your home Wi-Fi, install the profile in Settings > Mobile Data (or Mobile Network).
- Download and test your reliable VPN before leaving; it's much harder to get one once you're in China.
- Select the eSIM as your data line and activate data roaming only on that profile.
- Upon landing, check that WhatsApp and Maps open; if something resists, activate the backup VPN.
Your Spanish SIM remains as a second line for calls and SMS, so you don't lose your number or verification codes. If this is your first eSIM, carefully review how to install the profile and how to activate an eSIM to avoid surprises. And remember: activate data roaming only on the eSIM profile, not on your Spanish line, to avoid unwanted charges.
Frequently asked questions
What is the best eSIM for China if I want to use WhatsApp and Google?
The one that routes your traffic outside the country, because then the Great Firewall doesn't affect you, and those apps work directly, without tricks or configurations. It's more reliable than relying solely on a VPN. Even so, have a VPN installed as a backup before flying, in case you need to reinforce access at any time.
Does a normal eSIM work in China, or will I be without apps?
An eSIM that connects "as is" to the local network will be subject to the firewall and will block Google, WhatsApp, or Instagram, no matter how much coverage you have. To browse normally, you need an eSIM with international routing or to combine it with a reliable VPN downloaded before your trip. The signal isn't the problem; filtering is.
Do I need a VPN if I already have an eSIM with international routing?
It's not essential, because that type of eSIM already bypasses the firewall on its own. But we recommend having a reliable VPN installed as a backup. In China, getting a VPN on the fly is difficult because many of its websites are blocked, so downloading and testing it before leaving is the safest bet.
How many GB should I buy for a week in China?
For light use of maps and messaging, 3-5 GB is usually enough; if you're going to watch video, browse a lot, or upload photos, estimate 8-10 GB. Keep in mind that using a VPN adds a small overhead due to encryption, so go a bit generous if you plan to use it a lot or if the trip is long.
Can I use the same eSIM in China and Hong Kong?
It depends on the plan: some cover mainland China, Hong Kong, and Macau simultaneously with a single profile. Remember that the internet in Hong Kong is open, so you only need the "anti-firewall" solution for your days in mainland China. Always check the exact coverage of the plan before purchasing to avoid surprises.
Does the eSIM give me a Chinese number for SMS and calls?
Most data eSIMs for travel do not include a local number for traditional calls or SMS; they are designed for internet use. For calls and messages, you can use WhatsApp, Telegram, or other apps over that data, and keep your Spanish SIM as a second line to receive important SMS, such as your bank's codes.
When should I activate the eSIM, before leaving or upon arrival?
Install it from home using your Wi-Fi, but pay attention to when the plan's validity starts: in many cases, the counter begins when you first connect to a network at your destination. Installing it beforehand allows you to get everything ready and detect any issues with time to spare, without using data until you land.
Conclusion
In China, the best eSIM is not the cheapest, but the one that lets you use your usual apps by bypassing the Great Firewall, ideally with a backup VPN installed before you fly. Adjust your GBs to your trip duration, consider stops in Hong Kong, and install the profile from home. Prepare your eSIM for China before you leave and land with WhatsApp, Maps, and your social media working, no roaming, and no stress.
