3HK DIY
eSIM + PhysicalHutchison 3 Hong Kong's DIY prepaid SIM and travel top-up app
Best for: Visitors to Hong Kong who want a real local number and local rates, and HK residents managing Asia roaming day passes on their existing SIM.
Overview
3HK DIY is the prepaid SIM line of Hutchison Telephone (Three Hong Kong), managed through the DIY Prepaid SIM app. It targets Hong Kong local users and travellers with DIY roaming day passes, local data top-ups and real-name registration, rather than a conventional travel eSIM storefront.
3HK DIY is not a travel eSIM store — it is a Hong Kong carrier's official prepaid product, and that is exactly its value.
For visitors to Hong Kong, a DIY SIM gives you a real local 3HK number with local rates, supported by a physical retailer network (convenience stores, MTR shops) for top-ups, plus real-name registration handled in the app as HK law requires.
For Hong Kong residents, the DIY app doubles as a roaming manager: buy destination day passes (mainland China, Macau, Japan, Korea, Taiwan, Southeast Asia and more) that bill to your existing SIM, often cheaper than travel-brand eSIMs on the same 3HK network infrastructure. Plan selection, purchase and activation all happen inside the app rather than on a public web catalogue, which is why no static price table is published here. Trade-offs: coverage is Asia-centric (mainland China, Macau, Asia day passes), the experience assumes the app and registration flow, and it lacks the instant-QR simplicity of global eSIM brands. But if your trip is Hong Kong-centric or you want an official local number, it beats generic travel eSIMs on local rates and physical availability.
Pros
- Real local HK number with local rates and retail top-up network
- Official carrier product — no reseller middleman
- Asia roaming day passes often cheaper than travel eSIM brands
- Real-name registration sorted in-app, as HK law requires
Things to note
- App-first flow: no web catalogue or instant-QR simplicity
- Coverage is Asia-centric, not global
- Price transparency is poor — plans only visible inside the app
Key features
- Official prepaid brand of Three Hong Kong (Hutchison)
- DIY roaming day passes configured in-app
- Physical SIM with eSIM options on supported plans
- Real-name registration handled in the DIY app