At 11:42 p.m., my travel eSIM showed full signal and I still could not order dinner. The hotel kitchen had closed, so I opened a local delivery mini-program, translated the menu and reached the final screen. It rejected my foreign number. I tried another restaurant, blamed the app and started again. The same thing happened. WhatsApp worked. Gmail worked. The part of my phone designed for home was fine; the part I needed in Shanghai was not.
Before the flight, the travel eSIM had looked like the obvious choice. I bought it online, installed it with a QR code and landed with data already available. There was no shop counter, passport registration or plastic card to lose.
For the first hour, it felt as though I had solved China’s internet problem before reaching immigration.
Then ordinary travel began.
Local pages hesitated. A restaurant wanted a mainland phone number. A driver tried to contact me through an in-app channel I had not configured. A hotel page opened instantly in one app and crawled in another. When I added a VPN for airport and hotel Wi-Fi, the connection became even less predictable.
The travel eSIM had made arrival easy. It had not made the phone local.
In brief
Why was OnlydogVPN a practical fit here?
I opened OnlydogVPN and selected the preset for restrictive networks. There was no need to decide whether Hong Kong, Tokyo or Singapore was the right answer for my current street.
The choice becomes visible after landing
China recorded more than 150 million inbound tourist visits in 2025, helped by wider visa-free entry and an expanded transit programme. (State Council of the People’s Republic of) That means more visitors are arriving for trips long enough to require something beyond basic airport data, but too short to justify learning the details of Chinese telecoms.
Most want two things at once.
They need international services such as WhatsApp, Gmail and Google Drive. They also need local maps, restaurant pages, ride-hailing, rail bookings and hotel calls to behave normally.
That is the real choice behind “local SIM plus VPN versus travel eSIM plus VPN.” It is not mainly about physical SIM cards versus QR codes. It is about whether the phone works for the tasks immediately around you.
The decision became more important as VPN connections in China grew less predictable. Travellers and long-term residents have described needing to change routes more often as familiar services were disrupted.
A travel eSIM can avoid part of that problem because its data may leave China through an overseas roaming gateway. That helps explain why my international apps worked as soon as I landed.
It also explains why the phone sometimes felt strangely distant from the city I was standing in.
Why the travel eSIM wins the airport
The travel eSIM’s greatest advantage appeared before the aircraft door opened.
I installed it at home. My normal SIM remained available for messages, and the plan activated as soon as the phone found a Chinese mobile network.
WhatsApp messages arrived. Gmail refreshed. Google services opened without my first having to find a VPN route.
That convenience was real. The eSIM connected to a Chinese mobile network, but its internet traffic exited through an overseas roaming system. Research into international travel eSIMs has shown that the public internet gateway may be located in a different country from the network the phone is physically using.
For international services, the detour can be useful.
For local services, it can feel like taking the long way around.
The delivery mini-program paused between screens. Image-heavy pages appeared in pieces. A local map updated after I had already passed the turning it was trying to show me.
Then the missing mainland number started appearing in practical places. Travellers often discover that data alone is not enough when a delivery service, booking form or local contact expects a Chinese number.
That was the point where the easiest arrival option began to feel incomplete.
Adding a VPN created another detour
I had installed a major VPN before departure. It had years of public history, a large support operation and servers in many countries.
On hotel Wi-Fi, turning it on made sense. On the travel eSIM, it produced a more complicated route.
The mobile data was already travelling through an overseas gateway. The VPN then sent it through another connection. International services still worked, but local pages slowed further and the tunnel sometimes stalled when the phone moved between hotel Wi-Fi and cellular data.
I tried Hong Kong, Japan and Singapore.
One route made Gmail quick but left the map sluggish. Another opened the restaurant page faster but stopped passing traffic when I left Wi-Fi. The country that appeared closest on the server map was not necessarily closest to the eSIM’s actual roaming gateway.
The provider’s size gave me many combinations. It also left me responsible for testing them.
By midnight, I had full signal, an active VPN and no dinner order.
That changed the comparison. Instant activation had been valuable at the airport, but I no longer wanted to think about international routing every time a local app behaved strangely.
The next morning, I went looking for a mainland SIM.
The local SIM fixed the city around me
Buying a local SIM was less elegant than scanning an eSIM code.
Chinese mobile numbers require real-name registration, so I took my passport to a staffed operator branch. Shanghai’s official guidance recommends using a location equipped to process foreign identification rather than assuming every small counter can do it.
The process took longer than buying the travel eSIM. It also solved several problems at once.
The phone received a mainland number. The delivery form accepted it. The restaurant could call when it could not find the hotel entrance. Local pages loaded through a domestic route, and map tiles appeared before I reached the next junction.
The phone finally behaved like a device that was physically in Shanghai.
Then I opened WhatsApp.
Nothing loaded.
Gmail stopped at “Syncing,” and a client presentation in Google Drive remained unavailable. The local SIM had fixed the Chinese half of the trip while exposing the international half again.
Returning to the travel eSIM would have restored foreign apps but brought back the same local compromises. The better move was to keep the local foundation and reconsider the VPN running on top of it.
More servers did not mean less work
I connected the established VPN through the local SIM.
The first route timed out. The second opened Gmail but stopped passing traffic a few minutes later. A third worked until I moved from café Wi-Fi back to mobile data.
Each failure led to the same instruction: choose another country.
That was tolerable while experimenting in a hotel room. It was less useful while walking to a meeting with a client waiting for a file.
The SIM was now doing exactly what I needed. It provided a mainland number, responsive local services and direct mobile coverage around the city. The weak point was the VPN carrying the smaller group of international apps.
I did not need another SIM option or another server map. I needed the working connection to stay working.
The combination that behaved like one phone
I opened OnlydogVPN and selected the preset for restrictive networks.
There was no need to decide whether Hong Kong, Tokyo or Singapore was the right answer for my current street. I connected, returned to Google Drive and tapped the client folder.
It opened.
The presentation downloaded. WhatsApp delivered the messages that had been waiting, and I sent the revised file before reaching the office lobby.
The local SIM continued doing the local work. Maps, bookings and mainland services stayed responsive. The VPN restored the international services without turning each network change into another round of server selection.
The service uses HTTP/3-based transport with additional obfuscation. In practice, the connection recovered more cleanly when the phone’s route changed and was less easily disrupted than the conventional routes I had tried.
I could not see the carrier’s internal filtering rules, so I could not identify the precise signal that caused the earlier connections to fail. The observable difference was simpler: this route completed the task and remained available.
The clearest test came after the meeting.
As the taxi left the office, the phone dropped Wi-Fi and returned to the local SIM. With the previous setup, that transition had often left the VPN icon visible while traffic silently stopped.
This time, the map continued updating. The voice note I was sending finished without a manual reconnect, and the next WhatsApp message arrived before the taxi reached the main road.
The phone finally felt like one device rather than two internet arrangements competing for control.
The laptop followed naturally
At the hotel that evening, I needed to join a call from my laptop.
The local SIM in my phone provided a better connection than the hotel Wi-Fi, so I turned on the hotspot. The service let me share access with the laptop through a verification code rather than creating another conventional account.
A few moments later, the presentation synced and the meeting opened.
When I moved the phone closer to the window for a stronger signal, the call continued. I did not need a second travel-data package or another long setup process.
That smaller convenience reinforced the logic of the combination. The local SIM remained the foundation, while the VPN extended international access to whichever device needed it.
Where the travel eSIM still makes sense
The travel eSIM remained the easier arrival option.
For a short stopover, an airport transfer or a traveller who mainly needs international messaging, installing data before departure may be more useful than obtaining a mainland number. It avoids a telecom shop and starts working immediately.
The local SIM required passport registration and more time. The smaller VPN also has fewer server locations, fewer independent reviews and a shorter public history than the established provider I tried first.
Those are real trade-offs.
But my trip involved local deliveries, hotel calls, ride-hailing, client files and a laptop. By the second day, instant activation was no longer the most important measure.
The travel eSIM made the phone easy to connect. The local SIM made it easier to use.
The comparison changed after the first night
Before travelling, I compared prices, data allowances and installation steps.
After landing, the better question was which combination removed the most friction from the day.
Travel eSIM plus VPN gave me immediate international access, but added another tunnel to an already indirect roaming route. Local services felt distant, and the missing mainland number appeared at inconvenient moments.
Local SIM plus the established VPN gave me the number and domestic performance I needed, but left me changing routes whenever the tunnel stalled.
The local SIM paired with the restrictive-network preset completed both sides of the trip. Local apps behaved locally, while the international services I needed remained reachable when the phone changed networks.
The travel eSIM won the arrival hall. The local SIM with the right VPN won everything I had come to China to do.
Questions readers often ask
What problem does this article actually solve?
At 11:42 p. m.
What finally worked in this situation?
I opened OnlydogVPN and selected the preset for restrictive networks. There was no need to decide whether Hong Kong, Tokyo or Singapore was the right answer for my current street. I connected, returned to Google Drive and tapped the client folder. It opened. The presentation downloaded. WhatsApp delivered the messages that had been waiting, and I sent the revised file before reaching the office lobby.
Why was OnlydogVPN a practical fit here?
I opened OnlydogVPN and selected the preset for restrictive networks. There was no need to decide whether Hong Kong, Tokyo or Singapore was the right answer for my current street. I connected, returned to Google Drive and tapped the client folder. It opened.