Compare Mobile SIM Plans in Hong Kong

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23 live offers compared from 12 providers, from HK$48 /月. Updated daily.

What are Mobile SIMs in Hong Kong?

Mobile SIM plans connect your phone to a Hong Kong network for calls, texts and data, sold as prepaid SIMs or postpaid monthly contracts. Hong Kong has near-universal 4G and extensive 5G coverage, dense competition and among the cheapest data in the world. Plans range from low-cost prepaid data SIMs to premium unlimited-5G postpaid contracts, with local data ubiquitous and generous roaming to the mainland and beyond common.

How the Hong Kong market works

Three network operators run the infrastructure: csl (HKT), 3 Hong Kong and SmarTone. Alongside them, virtual operators (MVNOs) such as Birdie Mobile, SUN Mobile, O2Macro, WTT Mobile and HKBN mobile resell capacity with keen prepaid and SIM-only pricing. Number portability lets you keep your number when switching. Prepaid SIMs are widely sold in convenience stores; postpaid plans bundle 5G, roaming and sometimes handset instalments.

Benefits

Cheap data — intense competition makes local data among the most affordable anywhere.

5G coverage — the three networks offer widespread 5G in urban Hong Kong.

Flexible options — choose prepaid for control or postpaid for allowances and roaming.

China roaming — many plans include or cheaply add mainland China and Macau data.

Keep your number — number portability lets you switch operator without changing your phone number.

How to choose

Match the plan to your usage: prepaid data SIMs for light or flexible users, SIM-only postpaid for heavy data, or bundled contracts if you want a handset. Compare the monthly data cap and throttle speed, 5G access, contract length, roaming inclusions, and coverage on your preferred network. MVNOs often undercut the big three on SIM-only data if you do not need premium 5G speeds.

Leading providers in Hong Kong

csl (part of HKT) is the largest network with premium coverage; 3 Hong Kong and SmarTone compete on 5G, roaming and value. Among virtual operators, Birdie Mobile (a SmarTone brand), SUN Mobile (a csl brand), O2Macro, WTT Mobile and HKBN offer aggressively priced SIM-only and prepaid data plans. The choice often comes down to whether you prioritise network quality or the lowest data price.

What it costs

Prepaid and SIM-only data plans start from around HK$48 a month, mid-tier 5G postpaid plans sit in the low hundreds, and premium unlimited-5G contracts with roaming and handset instalments can reach around HK$2,000 a month at the top end. Watch for contract lock-ins, out-of-bundle data charges and roaming rates outside included regions. Handset-bundled contracts spread the phone cost into the monthly fee, which raises the headline price but avoids a large upfront outlay.

Protections and regulation

Mobile operators are licensed and regulated by the Office of the Communications Authority (OFCA) under the Communications Authority, which oversees spectrum, service quality, number portability and consumer codes. OFCA runs guidance on contracts and complaints, and the industry operates a cooling-off framework for certain sales. Billing and unfair-practice disputes can be raised with the operator, OFCA and the Consumer Council.

Common questions

Can I keep my number? — Yes; number portability lets you switch operator and retain your number.

Prepaid or postpaid? — Prepaid suits flexible or light users; postpaid gives larger allowances and roaming.

Do plans include China roaming? — Many do or offer cheap add-ons for the mainland and Macau; check before buying.

Is 5G included? — Premium postpaid plans include 5G; some cheaper SIM-only or MVNO plans are capped at 4G speeds.

Which network is best? — csl, 3 and SmarTone all offer strong coverage; MVNOs ride their networks, so check the underlying operator.

Mobile SIM Plans in Hong Kong — FAQ