# Does It Work In > Does It Work In is a cross-border compatibility reference for international travelers and remote workers: verified on-the-ground status for eSIM routing, VPN bypass, Alipay/WeChat Pay with foreign cards, transit IC cards, navigation apps and AI tools across China, Hong Kong, Japan, South Korea, Thailand, Vietnam, Taiwan and Europe. ## How compatibility verdicts work - Every guide separates the official vendor claim from verified on-the-ground behavior. - Each topic is assigned a clear status: works, conditional, workaround_required, or blocked. - Pre-departure steps (what must be installed or verified before boarding) are listed separately from arrival steps. - Outbound /go/ links may earn an affiliate commission; commissions never alter compatibility verdicts or failure-mode notes. ## For AI agents & developers - Full list of guides and country matrices: https://doesitworkin.com/llms-full.txt - Any page as structured data: append .json or .md to its path, e.g. https://doesitworkin.com/china/esim.json or https://doesitworkin.com/china/esim.md - Guides API, no key: https://doesitworkin.com/api/v1/guides?q=&country=&topic= - Countries API, no key: https://doesitworkin.com/api/v1/countries - Providers API, no key: https://doesitworkin.com/api/v1/providers?category=esim - Full JSON export: https://doesitworkin.com/data/guides.json - Stateless MCP server: https://doesitworkin.com/mcp (tools: search_guides, get_guide, get_country, list_providers, report_outdated_info) - Report outdated info, no key: POST https://doesitworkin.com/api/v1/reports with {"path":"/china/esim","field":"status","message":"Updated rule"} ## Destination hubs - [China (Mainland)](https://doesitworkin.com/china): Install a Singapore- or Hong Kong-routed travel eSIM (Airalo or Nomad) and link a foreign Visa/Mastercard inside Alipay and WeChat Pay before you board your flight. - [Europe (EU, UK & Switzerland)](https://doesitworkin.com/europe): Ensure your European regional eSIM explicitly includes Switzerland and the UK (non-EU), and always choose to pay in EUR/GBP/CHF—never USD—on card terminals. - [Hong Kong](https://doesitworkin.com/hong-kong): Google and WhatsApp work without a VPN, but ChatGPT and Claude block Hong Kong IPs—use a VPN or a Singapore-routed eSIM to access AI tools. - [Japan](https://doesitworkin.com/japan): Add a Suica or PASMO directly in Apple Wallet before arrival, and pick a low-latency eSIM (Ubigi or Nomad) instead of carrying a bulky Pocket Wi-Fi. - [South Korea](https://doesitworkin.com/south-korea): Google Maps cannot give walking or driving directions in South Korea—install Naver Map or KakaoMap in English mode before landing, and bring a physical chip card for T-money. - [Taiwan](https://doesitworkin.com/taiwan): Taiwan enforces NCC real-name registration on domestic carrier eSIMs; use a foreign roaming eSIM or pre-book a Chunghwa Telecom airport pickup pass on Klook. - [Thailand](https://doesitworkin.com/thailand): Skip the 220 THB Thai ATM fee by linking a Wise or Revolut card inside Grab and using contactless Visa/Mastercard on Bangkok MRT; install an AIS/DTAC eSIM before arrival. - [Vietnam](https://doesitworkin.com/vietnam): Choose a travel eSIM that roams on Viettel (Airalo Xin Chao or Nomad) rather than Vietnamobile, and link your foreign card in the Grab app before leaving home. ## Compatibility guides & comparisons - [Can Foreigners Use Alipay in China with a Visa or Mastercard?](https://doesitworkin.com/china/alipay) [conditional]: Yes. Foreigners can link international Visa, Mastercard, JCB, Diners Club, and Discover cards directly to the standard Alipay app. Transactions up to 200 CNY (~$28) are fee-free; payments above 200 CNY incur a 3% international card processing fee. - [Does ChatGPT Work in China, and How to Access It Safely?](https://doesitworkin.com/china/chatgpt) [workaround_required]: ChatGPT, Claude, and Gemini are double-blocked in China: blocked by the Great Firewall AND geo-blocked by OpenAI/Anthropic on both mainland Chinese and Hong Kong IPs. To use ChatGPT in China without a VPN, you must use an eSIM whose exit node is in Singapore (such as Airalo Chinacom), not Hong Kong. - [Does an eSIM Work in China, and Does It Bypass the Great Firewall?](https://doesitworkin.com/china/esim) [works]: Yes. International roaming eSIMs connect to China Unicom, China Mobile, or China Telecom towers but tunnel traffic through Singapore or Hong Kong, so Google, Gmail, WhatsApp, and Instagram work immediately—provided you install the eSIM before departure. - [Do Google Maps, Gmail, and WhatsApp Work in China?](https://doesitworkin.com/china/google-maps) [blocked]: Even with a roaming eSIM or VPN that unblocks Google servers, do NOT use Google Maps for navigation in mainland China: its map data is years out of date and shifted by 100–600 meters due to China's GCJ-02 coordinate system. Use Apple Maps (on iPhone) or Amap (Gaode Maps, now with English UI). - [Which VPNs Actually Work in China in 2026?](https://doesitworkin.com/china/vpn) [workaround_required]: Do not rely on a single consumer VPN in mainland China. Standard WireGuard and OpenVPN protocols are blocked within minutes; use a roaming eSIM as your primary bypass and keep an obfuscated VPN (Proton VPN Stealth or ExpressVPN Lightway) installed before departure for hotel Wi-Fi. - [Does WeChat Pay Work with Foreign Credit Cards in China?](https://doesitworkin.com/china/wechat-pay) [conditional]: Yes, once you complete passport verification inside WeChat. While Alipay is more forgiving for metro turnstiles and English mini-programs, you still need WeChat Pay because many Chinese cafes and restaurants use WeChat Mini Program table QR codes for ordering. - [Airalo vs. Holafly vs. Saily (2026): Data Caps, Fair-Use Throttling & Hotspot Rules](https://doesitworkin.com/compare/airalo-vs-holafly-vs-saily) [works]: Pick Airalo or Nomad when you want unthrottled fixed-GB data and unrestricted laptop hotspot tethering; pick Saily when you want a single reusable eSIM profile across 190+ countries; pick Holafly when you want day-based unlimited data on a single phone without counting gigabytes. - [Wise vs. Revolut for International Travel (2026): Weekend FX Fees, Alipay & ATM Limits](https://doesitworkin.com/compare/wise-vs-revolut-abroad) [works]: Carry both if possible—use Wise as your primary card so you never get hit by Revolut's 1% weekend exchange rate surcharge on Friday–Sunday restaurant bills, and keep Revolut in your wallet for a second monthly free ATM withdrawal allowance and disposable virtual cards. - [Does ChatGPT Work in Hong Kong, or Do You Need a Non-HK eSIM / VPN?](https://doesitworkin.com/hong-kong/chatgpt) [workaround_required]: No, ChatGPT and Claude do not work on local Hong Kong Wi-Fi or local Hong Kong SIM cards because OpenAI and Anthropic do not include Hong Kong in their supported territories. However, because Hong Kong does not block VPNs, any standard VPN (NordVPN, Surfshark, Proton VPN) or a Singapore-routed eSIM fixes this instantly. - [Do eSIMs in Hong Kong Require Real-Name Passport Registration?](https://doesitworkin.com/hong-kong/esim-real-name) [conditional]: Local Hong Kong SIMs and Hong Kong-issued eSIMs require mandatory passport real-name registration (RNR) before data will activate. Many international roaming eSIMs (Airalo Hkmobile, Saily, Nomad) either handle KYC in-app before departure or roam via foreign carrier agreements. - [Best eSIM for Japan: Coverage, Latency, and Fair-Use Throttling Compared](https://doesitworkin.com/japan/esim) [works]: Travel eSIMs work reliably across Japan on NTT Docomo, KDDI (au), and SoftBank. For the lowest latency and 5G access in congested Tokyo stations, pick Ubigi (an NTT subsidiary with local Japanese IP breakout) or Nomad. - [Japan Pocket Wi-Fi vs. eSIM: Cost, Battery Drain, and Multi-Device Math](https://doesitworkin.com/japan/pocket-wifi-vs-esim) [conditional]: For solo travelers and couples, individual eSIMs ($10–$20 total per person) are cheaper and far more convenient than Pocket Wi-Fi ($60–$95 for 14 days), and let two people split up in Tokyo without losing connection. Rent a Pocket Wi-Fi only if you have locked phones or 4+ devices traveling together at all times. - [How to Load Apple Wallet Suica, PASMO & ICOCA with a Foreign Card](https://doesitworkin.com/japan/suica-pasmo-foreign-card) [conditional]: Adding a digital Suica, PASMO, or ICOCA directly inside iPhone Apple Wallet works in 30 seconds and eliminates buying paper subway tickets. If a US-issued Visa credit card fails 3D Secure, top up using a Mastercard, Amex, or Wise Visa debit card outside the 02:00–04:00 JST maintenance window. - [Does Google Maps Work in South Korea? Naver Map vs. KakaoMap Setup](https://doesitworkin.com/south-korea/maps-navigation) [workaround_required]: Google Maps is crippled in South Korea: walking and driving directions do not work at all due to South Korean geospatial data export laws, and only basic subway/bus transit routing functions. Install Naver Map (set to English) before landing. - [Thailand eSIM vs. Airport Tourist SIM: AIS, DTAC, and TrueMove Compared](https://doesitworkin.com/thailand/esim-tourist-sim) [works]: Pre-installing a Thailand eSIM (Airalo DTAC, Nomad AIS, or SimOptions) lets you order a Grab immediately upon walking out of customs without waiting in 30-minute passport registration queues at Bangkok Suvarnabhumi. - [Vietnam eSIM, Grab & Card Payments: Why Airport SIMs Get Blocked Mid-Trip](https://doesitworkin.com/vietnam/esim-grab-payments) [conditional]: Avoid unofficial SIM kiosks at Hanoi (HAN) and Ho Chi Minh City (SGN) airports—Vietnam's Ministry of Information and Communications routinely deactivates improperly registered tourist SIMs after 3–5 days. Use a Viettel-backed travel eSIM (Airalo or Nomad) and set up Grab with a Wise card before arrival. ## Pages - [Does It Work In — Verified eSIM, VPN, Payment & App Compatibility by Country](https://doesitworkin.com/): Check whether eSIMs, VPNs, Alipay, WeChat Pay, Suica, Google Maps and ChatGPT actually work in China, Japan, Hong Kong, South Korea, Thailand, Vietnam, Taiwan and Europe. - [All Destination Compatibility Hubs](https://doesitworkin.com/countries): Country-by-country service status matrices for eSIMs, VPNs, foreign credit cards, mobile wallets, navigation apps and AI tools. - [Travel eSIM, VPN & Cross-Border Card Comparisons](https://doesitworkin.com/compare): Side-by-side comparisons of travel eSIMs (Airalo vs Holafly vs Saily), cross-border debit cards (Wise vs Revolut), and all country compatibility guides. - [Tested eSIM, VPN, Payment & Travel Providers](https://doesitworkin.com/providers): Directory of 25 travel eSIM, VPN, multi-currency payment and booking providers with starting prices, routing notes and where each works. - [Does It Work in China (Mainland)? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/china): Mainland China operates behind the Great Firewall and relies almost entirely on Alipay and WeChat Pay QR codes for daily payments, transit, and menus. - [Does It Work in Europe (EU, UK & Switzerland)? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/europe): One regional eSIM covers 30–39 European countries, contactless Apple Pay / Google Pay works almost everywhere, and dynamic currency conversion (DCC) on card terminals is the main tourist trap. - [Does It Work in Hong Kong? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/hong-kong): Hong Kong has open access to Google, WhatsApp, and social media, but enforces mandatory eSIM real-name registration for local numbers and is geo-blocked by OpenAI and Anthropic. - [Does It Work in Japan? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/japan): Japan has fast 5G/LTE networks and unrestricted internet, but 3D Secure 2.0 rules frequently reject foreign Visa cards on Japanese transit and Shinkansen booking sites. - [Does It Work in South Korea? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/south-korea): South Korea has ultra-fast 5G and widespread credit card acceptance, but national security laws restrict Google Maps from offering walking or driving turn-by-turn directions. - [Does It Work in Taiwan? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/taiwan): Taiwan has open internet access (Google, WhatsApp, ChatGPT all work natively), Chunghwa Telecom 5G coverage, and EasyCard transit payments. - [Does It Work in Thailand? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/thailand): Thailand offers fast 5G tourist connectivity on AIS and True/DTAC, Grab ride-hailing with foreign cards, and Visa/Mastercard tap-to-pay on Bangkok MRT. - [Does It Work in Vietnam? eSIM, VPN, Payments & Apps (2026)](https://doesitworkin.com/vietnam): Vietnam relies heavily on Viettel for rural 4G/5G coverage and Grab for urban transport, while third-party airport SIM kiosks frequently sell unverified SIMs that deactivate mid-trip. - [Can Foreigners Use Alipay in China with a Visa or Mastercard?](https://doesitworkin.com/china/alipay): Complete 2026 guide to linking a foreign Visa, Mastercard, Wise, or Revolut card to Alipay for mainland China: the 200 CNY fee threshold, passport verification limits, and transit QR setup. - [Does ChatGPT Work in China, and How to Access It Safely?](https://doesitworkin.com/china/chatgpt): Why both mainland China and Hong Kong IPs are blocked by OpenAI and Anthropic, and why you must pick a Singapore-routed eSIM (not a 3HK eSIM) to use ChatGPT in China. - [Does an eSIM Work in China, and Does It Bypass the Great Firewall?](https://doesitworkin.com/china/esim): Foreign travel eSIMs (Airalo, Nomad, Holafly, Saily) route mainland China mobile traffic through Singapore or Hong Kong, bypassing the Great Firewall for Google, WhatsApp, and Instagram without a separate VPN. - [Do Google Maps, Gmail, and WhatsApp Work in China?](https://doesitworkin.com/china/google-maps): Why Google Maps is both blocked AND geographically shifted by 500 meters in mainland China (the GCJ-02 coordinate offset), and why you should use Apple Maps or Amap instead. - [Which VPNs Actually Work in China in 2026?](https://doesitworkin.com/china/vpn): Why standard WireGuard and OpenVPN connections fail on mainland China Wi-Fi, how TLS/Stealth obfuscation performs, and why pairing a VPN with a roaming eSIM is the safest setup. - [Does WeChat Pay Work with Foreign Credit Cards in China?](https://doesitworkin.com/china/wechat-pay): How to activate WeChat Pay (Weixin Pay) with a foreign passport and international Visa/Mastercard, why restaurants use WeChat Mini Programs for ordering, and how it compares to Alipay. - [Airalo vs. Holafly vs. Saily (2026): Data Caps, Fair-Use Throttling & Hotspot Rules](https://doesitworkin.com/compare/airalo-vs-holafly-vs-saily): Side-by-side comparison of Airalo, Holafly, and Saily across China firewall bypass, fair-use speed throttling on 'unlimited' plans, laptop hotspot caps, and reusable eSIM profiles. - [Wise vs. Revolut for International Travel (2026): Weekend FX Fees, Alipay & ATM Limits](https://doesitworkin.com/compare/wise-vs-revolut-abroad): Real-world comparison of Wise and Revolut debit cards for travelers: Revolut's 1% weekend FX fee vs. Wise's 24/7 mid-market rate, Alipay/WeChat Pay linking, and ATM withdrawal allowances. - [Does ChatGPT Work in Hong Kong, or Do You Need a Non-HK eSIM / VPN?](https://doesitworkin.com/hong-kong/chatgpt): OpenAI, Anthropic (Claude), and Google Gemini block Hong Kong IP addresses. Here is how travelers and remote workers access ChatGPT in Hong Kong using a VPN or Singapore-routed eSIM. - [Do eSIMs in Hong Kong Require Real-Name Passport Registration?](https://doesitworkin.com/hong-kong/esim-real-name): How Hong Kong's Telecommunications (Registration of SIM Cards) Regulation affects tourist eSIMs, which eSIMs require passport uploads, and how long approval takes. - [Best eSIM for Japan: Coverage, Latency, and Fair-Use Throttling Compared](https://doesitworkin.com/japan/esim): How Ubigi (NTT Docomo 5G), Nomad, Airalo Moshi Moshi, and Saily perform in Tokyo, Kyoto, and Hokkaido—and why local Japanese breakout latency matters. - [Japan Pocket Wi-Fi vs. eSIM: Cost, Battery Drain, and Multi-Device Math](https://doesitworkin.com/japan/pocket-wifi-vs-esim): When an eSIM beats renting a Japan Pocket Wi-Fi router at Narita or Haneda—and the exact group/family scenarios where Pocket Wi-Fi still makes sense. - [How to Load Apple Wallet Suica, PASMO & ICOCA with a Foreign Card](https://doesitworkin.com/japan/suica-pasmo-foreign-card): Why foreign Visa cards sometimes fail when topping up Apple Wallet Suica in Japan, the 2:00–4:00 AM JST maintenance window, and which cards (Mastercard, Amex, Wise) work every time. - [Does Google Maps Work in South Korea? Naver Map vs. KakaoMap Setup](https://doesitworkin.com/south-korea/maps-navigation): Why Google Maps cannot give walking or driving directions in Seoul or Busan, and how to configure Naver Map and KakaoMap in English before your trip. - [Thailand eSIM vs. Airport Tourist SIM: AIS, DTAC, and TrueMove Compared](https://doesitworkin.com/thailand/esim-tourist-sim): Whether to install a Thailand travel eSIM before flying or buy an AIS / DTAC tourist SIM at Bangkok Suvarnabhumi (BKK) or Phuket (HKT) airport—plus how to avoid the 220 THB ATM fee. - [Vietnam eSIM, Grab & Card Payments: Why Airport SIMs Get Blocked Mid-Trip](https://doesitworkin.com/vietnam/esim-grab-payments): Why Vietnam cracked down on unverified airport SIM cards, why Viettel is essential for Ha Long Bay and Ha Giang Loop coverage, and which ATMs in Vietnam charge zero fees. - [About & Methodology](https://doesitworkin.com/about): How Does It Work In verifies cross-border eSIM routing, VPN protocols, foreign card linking and app availability, and how affiliate links work.