Staying connected in Hong Kong.

Hong Kong's prepaid market is competitive and cheap: roughly 6 to 13 dollars buys a week or a month of data from 3HK, csl or China Mobile Hong Kong, sold at HKIA and in 7-Eleven and Circle K stores across the city. Since 2023 prepaid SIMs require real-name registration, so bring your passport; the shop or the app walks through it and it is not onerous.

On top of that, free wifi is close to ubiquitous in malls, MTR stations, cafes and hotels, which for a short stay is a genuine backstop. Against a US day pass at 10 to 12 dollars a day, the local SIM wins outright on any stay longer than a day, and a travel eSIM at a few dollars per gigabyte sits in between. We earn on eSIM links and nothing on a 3HK SIM.

This is the part worth reading twice, because plenty of visitors assume Hong Kong and the mainland behave the same way online. They do not. In Hong Kong, Google, Gmail, Maps, WhatsApp, Instagram, Facebook and YouTube all work normally. A Hong Kong SIM or a travel eSIM here needs no workaround and no VPN.

If your itinerary crosses into Shenzhen or further, the calculus flips: on a mainland network the Great Firewall blocks those services and VPNs have become unreliable. The practical answer is a roaming plan set up before you fly, which routes your traffic outside the mainland, rather than buying a mainland SIM when you get there. A Hong Kong prepaid SIM roaming into the mainland can also work for the same reason, and it is worth checking the roaming rate before relying on it. For the detail, see the staying connected in China page.

There is nothing to warn you about on coverage. Hong Kong has among the densest networks anywhere: fast 4G and 5G across the territory, working signal in the MTR tunnels, on the Star Ferry, up to The Peak and out to Lantau and the outlying islands. Remote hiking trails on the far side of the New Territories can thin, which is a detail rather than a plan.

On the alternatives: AT&T and Verizon day passes are about 10 to 12 dollars a day and AT&T caps its Day Pass at 10 daily fees per line per bill period, about 120 dollars, and covers the rest of that bill period on land, so the daily arithmetic stops past day 10, while T-Mobile's current tiers include roughly 5GB on Experience More, Magenta MAX and Go5G Plus, 15GB on Experience Beyond and Go5G Next and 30GB on Better Value. A Nomad eSIM is the simplest option for a short stopover or a multi-city Asia trip, at a few dollars per gigabyte. This guide is written for US travelers departing the US. For more, see cash or card in Hong Kong, taxis and apps in Hong Kong, and the Hong Kong money guide.

Common questions

Quick answers.

More on Hong Kong

The little money things nobody warns you about.

• Taxis in Hong Kong, and the color zonesHong Kong taxis are cheap, honest and everywhere, but two things trip up visitors: they come in colors by area, and many still take only cash. Here is how it works.
• Tipping in Hong KongHong Kong has a light tipping culture. Most sit-down restaurants add a 10% service charge, so a tip is largely built in, and casual spots and taxis expect little or nothing. Here is what you actually owe.
• Do I need cash in Hong Kong, or can I use cards?Short answer: a card for most things, an Octopus card for the rest, and a little cash for markets. The Octopus card is the real key to Hong Kong. Here is how to handle it.
• Bringing your dog or cat to Hong Kong.Hong Kong is stricter on paperwork than on waiting. The US sits in its middle risk tier, which means no quarantine by default, no rabies titer, and no long biology clock. The whole game is the AFCD Special Permit, which you must hold before you book a flight, and getting every document exactly right, because a single gap can turn a no-quarantine move into months of it. Here is the route.
• What does getting sick in Hong Kong cost a visitor?Hong Kong is unusually honest about this: the Hospital Authority publishes a price list for people who are not Hong Kong residents, and you are on it. The rates went up in January 2026.