Hong Kong has some of the cheapest mobile/internet / TV services in the world, with a myriad of options.
Mobile phone
As a saturated market, mobile phone services are generally very good and their package offers are quite similar. At the moment, the latest update includes 5G internet services but is only available in limited areas in Hong Kong. High speeds at 4G are highly popular and widely used, though, and should be more than enough for your needs.
Most of the plans are available with or without a phone bundled in. If you already have a phone it should work in Hong Kong with a new SIM card.
New phone contracts are usually 24-months long, and most providers have promotions that might mean you can take home a new phone right away with little down payment. Most people in Hong Kong go with an unlimited plan, although the availability of free Wi-Fi can be a big factor when choosing the right plan or provider for you.
Internet (for your home)
There are three main providers of these services. HK Broadband has the best coverage in terms of connected buildings, especially in villages, and can be bundled with a mobile plan. I-cable’s internet services are usually offered in a bundle with their TV package, which is known for its sports channels.