CHINA CONNECTIVITY
Mainland China: eSIM, roaming or a local SIM?
In mainland China the real question is not “will I have data” but “will my usual apps work”. Google, WhatsApp, Instagram and similar services are not directly accessible on mainland networks — and whether you need them decides between roaming, a travel eSIM that routes outside the mainland, or a registered local SIM.
Quick answers
Should I use an eSIM or a local SIM in China?
If you need Gmail, WhatsApp and similar overseas apps, pick a travel eSIM with overseas routing or home-carrier roaming. If you will mostly use WeChat, Alipay, Amap and other local apps on a longer stay, a registered local SIM is cheaper per GB and includes a +86 number. A combination — eSIM for data, home SIM for texts — also works.
Do Google and WhatsApp work in mainland China?
Not on mainland local networks or local SIM cards. International roaming and most travel eSIMs that route outside the mainland are unaffected — check the plan's routing and coverage notes before buying.
What documents do foreigners need for a Chinese SIM card?
An original passport. Every SIM in mainland China requires real-name registration with a live facial-recognition scan, done at an official carrier service hall of China Mobile, China Unicom or China Telecom, or a major airport counter. Small shops usually cannot register foreign passports.
Can I register Alipay or WeChat without a +86 number?
Alipay and WeChat Pay support registration with an overseas mobile number and binding international cards such as Visa and Mastercard, which covers basic spending. Some local services — ride-hailing, food delivery, public Wi-Fi verification — may still require a +86 number. Follow each app's current rules.
01Lock what you actually need#
If the trip depends on Gmail, WhatsApp or Google Maps, pick a plan whose traffic exits outside the mainland: your home carrier's international roaming, or a travel eSIM that explicitly covers mainland China with overseas routing. If you will live inside WeChat, Alipay, Amap and DiDi instead, a local mainland SIM is the smoother fit.
Then weigh devices and trip length: one phone for a week or two points to a travel eSIM; several devices need a hotspot-friendly plan; a stay of weeks, or needing a +86 number for verification codes and local app sign-ups, is where a local SIM wins. Confirm the phone is unlocked and eSIM-capable if you go that way.
02How four options compare#
The table ranks hassle, not this week's price. Plans change; follow the operator's page on the day. The core difference is routing: roaming and most travel eSIMs exit overseas, so your usual apps keep working; a local mainland SIM sits inside the mainland network, where those apps are not directly reachable.
Voice and verification codes are a separate axis: a local SIM comes with a +86 number that receives SMS codes from domestic services; roaming and data-only eSIMs have no mainland number, so some local apps stall at the verification step.
| Option | Best when | Overseas apps | Main limits |
|---|---|---|---|
| Home-carrier roaming | Short trip, need Gmail/WhatsApp, no SIM swap | Works (traffic routes via your carrier) | Day-billed; highest total cost |
| Travel eSIM with overseas routing | One phone, installed before departure | Usually works (check routing notes before buying) | No +86 number; some plans exclude the mainland |
| Local registered SIM | Longer stay, +86 number and local apps | Not directly accessible | Original passport plus face scan at official channels |
| Hotel / public Wi-Fi | Backup and emergencies | Not directly accessible | Often needs +86 SMS verification; patchy coverage |
03Real-name registration for local SIMs#
Every SIM card in mainland China requires real-name registration. Foreign visitors register with an original passport, plus a live facial-recognition scan on site. Go to an official China Mobile, China Unicom or China Telecom service hall, or a counter at a major airport; small neighbourhood shops and agents often cannot register foreign passports, and you should never buy an unregistered card.
The Shanghai government's English portal describes the process: choose a plan, show the passport, register and activate on the spot. Prepaid balance and number validity follow the carrier's terms, and numbers are recycled after long gaps without top-up. On a longer stay, ask about renewal rules before you buy.
04Install and activate are still two steps#
Travel eSIM: write the profile on home Wi-Fi, then turn that line's data on after landing. Treating “installed” as “online” is how you discover the switch is still off in the arrivals hall. Keep the home SIM for bank texts with its data roaming off, so it does not bill beside the eSIM plan.
A dual-SIM split is the common setup: the home SIM only receives texts and calls, while mobile data runs entirely on the eSIM or local SIM. For a physical local SIM, set it up per the service hall's instructions; if there is no signal, follow the eSIM checklist on this site in order — restart, right line, data switch, APN — and do not delete the profile first.
05Three worked trips#
Example 1: four business days in Shanghai, dependent on Gmail and WhatsApp. Take home-carrier roaming or an overseas-routed travel eSIM — working on landing, no local SIM involved. Example 2: two weeks across several cities, using Alipay, DiDi and Amap. A local SIM is smoothest: a +86 number for verification codes and the lowest cost per GB; if registration feels like too much, combine a travel eSIM for data with the home SIM for texts.
Example 3: a month or more visiting family or on assignment. Buy a local prepaid plan at an official service hall and ask about renewal and suspension rules; keep home-number roaming or an overseas eSIM as the channel for overseas apps. Split usage in this site's data estimator — video is still the biggest lever.
06Maps, payments and ride-hailing#
Google Maps data in the mainland is stale and offset — do not rely on it. On iPhone use Apple Maps (mainland data provided by Amap), or install Amap or Baidu Maps; download offline maps and translation packs before departure. Ride-hailing runs on DiDi; some features need a +86 number or the app's international sign-up path.
Payments are QR-code first: Alipay and WeChat Pay both accept international cards such as Visa and Mastercard, which covers most small purchases; cash is still the fallback in taxis and small shops. Sign-up and verification rules for these apps change often — follow the in-app and official instructions.
07Common mistakes#
The most common: landing before enabling roaming or finding the plan excludes the mainland; buying a local SIM and only then discovering Gmail and WhatsApp do not work on it — overseas apps need roaming or an overseas-routed eSIM. The opposite extreme is relying on hotel Wi-Fi alone: many public hotspots ask for +86 SMS verification, which you cannot receive without a local number.
Also: skipping offline maps and translation packs; assuming a corner shop can register a foreign passport; and taking third-party VPN reliability for granted — availability and compliance change, so follow official statements, and if you need overseas apps to work dependably, choose roaming or an overseas-routed eSIM.
08Before you fly#
Answer “do I need overseas apps” first, then pick the plan; phone unlocked and eSIM-capable if you go that way; offline maps and translation packs downloaded; home-SIM data roaming off; original passport ready if you will register a local SIM at an official service hall or airport counter.
Rules and plans change. Follow the operator's and government portals' pages on the day. This page is a choosing order, not legal advice. Rerun the data tool with your own hours.
Sources
PARTNER PICKS
Where to get it
These are partner links: purchases may earn us a commission at no extra cost to you.
China eSIM on Klook
Compare China eSIM listings. If you need Google or WhatsApp, check that data is routed outside the mainland — a local SIM will not do that.
→AiraloChina eSIM on Airalo
Airalo’s China plans use overseas routing, so Google and WhatsApp usually work without a VPN. Confirm coverage on the order page.
→MORE GUIDES
Keep reading before you go
Hong Kong: eSIM, roaming or a local SIM?
Maps, messaging and mobile payments in urban Hong Kong barely work without data. Narrow the choice by trip length, phone compatibility and whether your usual number must stay reachable — then install an eSIM at home, enable roaming, or buy a prepaid SIM after landing.
Japan mobile internet: eSIM, pocket Wi-Fi or a local SIM?
Maps, translation and messaging in Tokyo, Osaka and Kyoto barely work without data. The best option depends on how many devices you carry, how long you stay and whether you need calls — lock that in first, then install an eSIM at home, rent pocket Wi-Fi at the airport, or buy a prepaid SIM after landing.
Check these before travelling with an eSIM.
Do not wait until arrival to discover an incompatible phone, an expired QR code or the wrong data line. Installing and activating are two steps: install while you have internet, turn data on after you land.