The Fastest Open Internet in Mainland China — No VPN Required

Most eSIM providers treat China as an afterthought: a generic "Asia" package with a note that says "a VPN may be required." Sigma Mobile treats China as the main event — because we're based here.

We run our own office in Shenzhen, work in direct cooperation with China Mobile International, and spend every day making sure that when someone lands in Beijing, checks into a hotel in Shanghai, or takes a client call in Hong Kong, their connection simply works — no VPN, no app blocked, no buffering wheel spinning during a live stream.

That focus shows up in the numbers: on our China Mainland eSIM, travelers are seeing real-world speeds around 150 Mbps downlink and up to 30 Mbps uplink — genuinely fast by any standard, and very possibly the fastest open, VPN-free internet access available to visitors in Mainland China today.

Why "Just Get a Local SIM" Doesn't Solve the Real Problem

China's mobile networks are excellent — CMCC, CMHK, and CTM run some of the best 4G/LTE/5G infrastructure anywhere. The issue was never speed. It's what a standard domestic SIM routes you through: China's national internet filtering, which quietly closes the door on Google, WhatsApp, Instagram, YouTube, most Western news, and a long list of everyday apps.

That's why the usual advice is "install a VPN before you land." It's also increasingly bad advice — VPN apps get pulled from app stores, VPN traffic gets throttled or blocked outright, and the one workaround you were counting on can stop working exactly when you need it most, mid-call, mid-flight, mid-stream.

Sigma Mobile's China eSIMs take a fundamentally different approach: your data is routed over international roaming through our China Mobile International partnership, rather than as domestic Chinese subscriber traffic. You get the open internet you already use at home — plus the fast, dense CMCC network underneath it.

Built by People Who Actually Live This

We're not a foreign call center guessing what travelers in China need. Sigma Mobile's operations run out of our own Shenzhen office, inside the Greater Bay Area, working directly alongside our network partner, China Mobile International. That relationship is what lets us offer genuine 4G/LTE/5G performance with open, VPN-free routing — not a generic international data bundle with China added as an afterthought.

It's also why over 2,000 expats, business travellers, and tourists already rely on Sigma Mobile as their connectivity in China and the Greater Bay Area — plus a fast-growing community of professional streamers and content creators, who need the one thing a shaky connection can never give them: a stable, high-uplink pipe that won't drop mid-broadcast.

Three China eSIMs, One Expert Behind All of Them

1. China Mainland eSIM — Fast, Open, No VPN

Our core plan for Mainland China: Beijing, Shanghai, Guangzhou, Shenzhen, and everywhere in between.

• Network: CMCC (China Mobile), with 4G/LTE/5G speed
• Real-world performance: around 150 Mbps down / up to 30 Mbps up on supported networks
• Data: daily allowances (1GB, 2GB, or 3GB/day) or total bundles from 1GB up to 50GB, plus an unlimited-data option, over validity periods from 1 to 30 days
• Hotspot/tethering: supported, so your laptop can ride on your connection too
• No eKYC, no identity verification required for Mainland-only use
• Data-only — no phone number or SMS, but full support for VoIP calls (WhatsApp, Skype, and similar) over your open connection

Get the China Mainland eSIM →

2. China Mainland eSIM — AI & Streaming Optimized (TikTok, ChatGPT, Claude)

Same fast CMCC backbone, tuned specifically for the platforms that give travelers and creators the most trouble on a standard connection: TikTok, ChatGPT, Claude, and similar AI and social tools that are normally out of reach in Mainland China.

• Everything in the standard China Mainland eSIM, plus optimized routing for AI assistants and TikTok, so these platforms load and respond the way they do at home instead of timing out or refusing to connect
• Same daily and total data tiers (500MB–3GB/day, or 1GB–50GB total), 1–30 day validity
• The plan of choice for our streamer community and anyone whose workflow leans on AI tools throughout the day

Get the AI & Streaming Optimized eSIM →

3. Greater Bay Area eSIM — Mainland China + Hong Kong + Macau

One eSIM, three networks, zero re-registration hassle. Ideal if your trip (or your job) crosses the internal border between the Mainland, Hong Kong, and Macau.

• Networks: CMCC (Mainland), CMHK (Hong Kong), CTM (Macau) — 4G/LTE/5G throughout
• Data: daily allowances (500MB, 1GB, 2GB, 3GB, or unlimited) or total bundles from 1GB to 50GB, 1–30 day validity
• Hotspot/tethering: supported
• Identity verification (eKYC): required for use in Hong Kong and Macau — a standard local carrier requirement, completed quickly during activation
• Data-only with VoIP calling support; no top-up and no device transfer once installed, so choose your tier before you activate

Get the Greater Bay Area eSIM →

(A quick honest note, the same one we'd give any traveler: network routing, app availability, and local policy can shift over time, and no connectivity method can promise 100% access to every service, everywhere, always. We recommend testing the apps you rely on most as soon as you land, and keeping a lightweight backup plan for anything mission-critical.)

How to Get Set Up (It Takes Minutes)

1. Pick your plan — Mainland only, AI/streaming-optimized, or the full Greater Bay Area, depending on your itinerary.
2. Choose your data tier — daily or total, matched to how long you'll be in the region.
3. Receive your QR code — delivered to your inbox within minutes of payment.
4. Install before you fly — scan the QR code while you still have stable WiFi.
5. Activate on arrival — your validity period starts only once the eSIM connects and begins using data, so nothing is wasted sitting in your inbox.

Works on any eSIM-compatible iPhone or Android device — no physical SIM to queue for, register, or lose.

Why Sigma Mobile Is the Name Expats and Business Travelers Trust in China

• Local expertise, not guesswork — a real office in Shenzhen, inside the Greater Bay Area
• Direct cooperation with China Mobile International for genuine CMCC/CMHK/CTM network access
• Speed that actually holds up — around 150 Mbps downlink and up to 30 Mbps uplink, probably the fastest open internet access available to visitors in Mainland China
• Open, VPN-free routing to the apps and platforms you already use
• Trusted by 2,000+ expats, business travellers, and tourists — plus a growing base of professional streamers who depend on a stable uplink
• Flexible data and validity across all three plans, from a quick day trip to a full month
• Instant digital delivery — order today, land connected tomorrow

Whether you're relocating to Shenzhen, closing a deal in Shanghai, exploring Hong Kong and Macau on the same trip, or streaming live to an audience that doesn't care about your network problems, Sigma Mobile keeps you online — fast, open, and exactly the way you expect the internet to work.

Frequently Asked Questions

Do I really not need a VPN in Mainland China with Sigma Mobile? Sigma Mobile's China eSIMs route your data over international roaming through our China Mobile International partnership, rather than domestic Chinese subscriber infrastructure, which is why the vast majority of our users access Google, WhatsApp, Instagram, YouTube, and similar platforms without installing a VPN. Network conditions and local policy can shift, so we always recommend testing your key apps as soon as you land.

How fast is the connection, really? On supported CMCC coverage, travelers typically see speeds around 150 Mbps downlink and up to 30 Mbps uplink — fast enough for HD video calls, large file transfers, and live streaming without the usual China-trip compromises.

What's the difference between the standard China Mainland eSIM and the AI/streaming-optimized version? Both run on the same fast CMCC network with the same data tiers. The AI & streaming-optimized ("TT GPT") plan adds tuned routing specifically for TikTok, ChatGPT, Claude, and similar platforms that need it most.

Do I need the Greater Bay Area eSIM, or is the Mainland-only plan enough? If your trip stays entirely within Mainland China, the standard or AI-optimized Mainland eSIM covers you. If you're also visiting Hong Kong or Macau, the Greater Bay Area eSIM keeps you on one eSIM across all three networks instead of buying separate local plans.

Is identity verification required? No eKYC is required for Mainland-only use. The Greater Bay Area eSIM requires identity verification for use in Hong Kong and Macau, per local carrier rules — it's completed quickly during activation.

Do I get a phone number or SMS with these plans? No — all three China eSIMs are data-only. Voice calling works over VoIP apps like WhatsApp or Skype using your fast data connection.

How fast can I get set up? Instantly. Your QR code arrives by email within minutes of ordering, and your plan activates the moment you connect to a network in the region — not when you buy it.

Ready to experience the fastest open internet in Mainland China? 👉 China Mainland eSIM · AI & Streaming Optimized eSIM · Greater Bay Area eSIM (China + Hong Kong + Macau)