China eSIM Setup on Samsung Galaxy (One UI)
Add a China eSIM to a Galaxy: check the EID first, install through SIM manager on home Wi-Fi, and flip the right roaming switch when you land in China.
Updated August 24, 2026
Two worries travel with everyone bound for China, and they are different worries. The first is the bill: home carriers put China in the out-of-region band, the most expensive tier on the roaming table, and a fortnight of navigation, group chats and uploaded photos at that rate costs more than the trip’s meals. The second is quieter and worse — the fear that the apps a whole life runs through will simply stop answering on a local network, and that the fix involves researching VPNs on forums the night before the flight.
A roaming data eSIM answers both at once, and honestly. The plan is bought in the China eSIM app and installed on the Galaxy over your own Wi-Fi; because it is a roaming line, its data routes through an international network, the way roaming on your own SIM always has — which is why the phone’s apps carry on behaving normally, with nothing to set up. The clock starts at the first connection in mainland China and not at checkout, so install it the evening you pack. Plans are on pricing, and if the idea is new, what an eSIM is explains it in two minutes.
The Galaxy-specific complication is not the tap sequence, which is short and stable. It is whether your particular unit supports eSIM at all. Samsung sells the same model names into dozens of markets through dozens of operators, some regional and carrier variants ship without the hardware, and Galaxies sold in mainland China itself mostly do — so we will not publish a model list we cannot verify. Dial *#06# on the phone in your hand: an EID printed under the IMEI is the real answer, and it takes five seconds. Other handsets are covered on the iPhone and general Android pages.
Two limits to know now rather than later. The plan is data-only, which means no Chinese phone number — your own number stays live on your own SIM, internet calling covers the rest, and only the occasional local app that demands a +86 number will mind. And coverage belongs to geography: excellent in the cities, along the high-speed rail corridors and in most towns, thin to absent on the high plateau and in the deserts of the far west. Nobody’s SIM changes where towers stand. Hotspot is included, so one Galaxy can put a laptop or a family online where there is signal, and offline maps downloaded before the remote leg cover the places where there is not.
Installation steps
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Step 1
Check the phone before you buy anything
Open the dialler and enter *#06#. An EID listed under the IMEI means your Galaxy has eSIM hardware. No EID means it does not, and no setting will add one. Model names are a poor guide — Samsung ships the same names into dozens of markets with different insides, and units sold in mainland China usually lack eSIM entirely — so trust your own handset over any list.
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Step 2
Buy the plan in the China eSIM app
Pick the plan that suits the trip and pay. The QR code and manual activation details land under your order immediately and stay there, which matters if the first attempt goes wrong.
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Step 3
Install on Wi-Fi before you leave
Downloading a profile needs a working connection, and this destination adds its own reason to be early: once you are on a Chinese network, Google Play is effectively out of reach, so anything not on the phone before landing stays off it. The plan counts from its first connection in mainland China, not from when you paid, so nothing is lost by installing the evening you pack.
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Step 4
Open Settings and go to Connections
Connections sits near the top of the Settings list. If your build looks different, type SIM into the search box at the top of Settings — Samsung has moved this menu between One UI generations.
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Step 5
Open SIM manager and tap Add eSIM
SIM manager lists your physical SIM and any digital lines. The button is usually Add eSIM; on older One UI versions the same thing reads Add mobile plan.
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Step 6
Scan the QR code, or enter the code by hand
Choose the option to scan a QR code from a service provider and point the phone at the code on another screen. With no second screen, pick Enter activation code and copy the SM-DP+ address and activation code out of the app. Both install an identical line.
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Step 7
Name the line and leave it switched off
Call it China so the preferred-SIM screens are readable later, keep your home SIM set for calls and texts, and turn the new line off until you land. Nothing is consumed while it sits there.
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Step 8
On arrival: enable it, select it for data, turn roaming on
Back in SIM manager, switch the China line on and set Mobile data to it under Preferred SIMs. Then enable Data roaming for that line — on One UI the switch lives under Connections, Mobile networks — which is what lets it register on a visited network. Roaming is the whole design here: it is why the data takes the international route and your apps carry on as usual. Leave the switch off for your home SIM, where your own carrier is watching.
Troubleshooting
Will my usual apps still work once I am in China?
Yes, in the way roaming always works: this line's data routes through an international network, the same as roaming on your home SIM would, so the apps on the phone behave the way they do at home — no VPN, nothing to configure. That is the factual property of a roaming line, not a guarantee about any single service. The common surprise is Wi-Fi: hotel and café networks are local connections with local rules, so if an app sulks, turn Wi-Fi off and let the eSIM carry it.
Does this give me a Chinese phone number?
It does not. The plan carries data only. There is no +86 number on it, none can be added, and your own number stays where it is. Most services a visitor touches accept a foreign number; a few local apps want a +86 number to register, and where one insists there is no workaround on a data plan.
There is no Add eSIM option in SIM manager.
Either the handset has no eSIM hardware or it is carrier-locked. The dialler code *#06# settles the first question: an EID means the hardware is there. If the EID is present and the option is not, the phone is almost certainly locked to the operator who sold it, and only they can unlock it. Ask before you travel, not from a hotel lobby six or seven time zones ahead of them.
The download failed partway with an error.
Usually the Wi-Fi dropped mid-transfer; occasionally the phone is locked. Get onto a stable connection, restart the Galaxy and try again. Your QR code stays valid until a profile installs successfully once, so a failed attempt has not burned it.
I am in China and mobile data will not work.
In order: in SIM manager, confirm the line is on and selected as the Mobile data SIM; under Mobile networks, confirm Data roaming is enabled for it; then toggle Airplane mode to force a fresh search. If it is still dead, switch off automatic network selection, choose a network manually, let it register, and set selection back to automatic.
Does enabling Data roaming cost extra?
No. On a travel line that switch is not a billing decision — it is the permission Android needs to attach the line to a network other than its own, which is the only kind it will ever see. The switch that does cost money is the one on your home SIM, so leave that off.