Hong Kong 5G plans compared by cost-per-GB (2026-07-22)
The 15 Hong Kong 5G mobile plans in our catalogue, compared by cost per GB — the number that fairly compares a big-data and a small-data plan. As of 2026-07-22; confirm current pricing.
To compare 5G plans of different sizes fairly, look at cost per GB (monthly fee ÷ data) — the headline monthly price misleads you, cost per GB does not. As of 2026-07-22, across the 15 5G mobile plans in our catalogue, it ranges from about HK$1.5 to HK$7.9 per GB (confirm current pricing with the carrier before you sign). The table below is sorted by cost per GB, from low to high.
| Plan | Carrier | Monthly | Data | Cost/GB | Contract (months) |
|---|---|---|---|---|---|
| CMHK 5G $149 Plan (100GB) | China Mobile HK | HK$149 | 100GB | HK$1.5 | 24 |
| csl 5G 250GB Plan | csl / 1O1O | HK$498 | 250GB | HK$2.0 | 24 |
| SmarTone 5G Upgraded Plan (110GB) | SmarTone | HK$239 | 110GB | HK$2.2 | 24 |
| CMHK Family Sharing Plan (180GB) | China Mobile HK | HK$396 | 180GB | HK$2.2 | 24 |
| 3HK 5G SIM Plan 4 (100GB) | 3 Hong Kong | HK$228 | 100GB | HK$2.3 | 24 |
| 3HK 5G SIM Plan 2 (50GB) | 3 Hong Kong | HK$148 | 50GB | HK$3.0 | 24 |
| 3HK 5G SIM Plan 3 (60GB) | 3 Hong Kong | HK$188 | 60GB | HK$3.1 | 24 |
| CMHK 5G $98 Plan (30GB) | China Mobile HK | HK$98 | 30GB | HK$3.3 | 24 |
| csl 5G 100GB Plan | csl / 1O1O | HK$348 | 100GB | HK$3.5 | 24 |
| SmarTone 5G Extreme Speed Plan (50GB) | SmarTone | HK$178 | 50GB | HK$3.6 | 24 |
| CMHK Greater Bay Area Plan (50GB) | China Mobile HK | HK$179 | 50GB | HK$3.6 | 24 |
| 3HK 5G SIM Plan 1 (30GB) | 3 Hong Kong | HK$124 | 30GB | HK$4.1 | 24 |
| 1O1O 5G 100GB Service Plan | csl / 1O1O | HK$419 | 100GB | HK$4.2 | 36 |
| SmarTone 5G Student Plan (30GB) | SmarTone | HK$128 | 30GB | HK$4.3 | 24 |
| csl 5G 30GB Plan | csl / 1O1O | HK$238 | 30GB | HK$7.9 | 24 |
Figures as of 2026-07-22, from the public plans in the Telecom Rex catalogue; prices and promotions change often, so confirm current details before you sign. Plans differ in contract length and data cap — both are shown side by side so the comparison is like-for-like.
Why cost-per-GB is the fair comparison
A HK$180 large-data plan can cost less per GB than a HK$120 small-data one — the monthly price alone hides that. Divide fee by data and compare cost per GB instead. Then check the contract length: a lower monthly fee on a longer term is not automatically cheaper overall — see our total-cost guide.
Where Telecom Rex fits
Telecom Rex (電訊暴龍) lists real plans from multiple carriers, and its verified consultants work out the cost per GB for your usage and confirm today’s price. To see every plan with live filtering, use the comparison page; to have a real person help, ask a Telecom Rex consultant.
FAQ
How is cost per GB calculated?
Monthly fee ÷ data allowance (GB). A HK$238 plan with 30GB works out to about HK$7.9 per GB. It lets you compare a big-data and a small-data plan on the same footing.
Is a lower cost per GB always the better deal?
Not necessarily — it depends how much data you actually use. A heavy user gets better value per GB from a large-allowance plan; a light user should not pay for data they will never touch. Estimate your monthly usage first, then compare cost per GB among plans that cover it.
Why does the same plan show a different price on different sites?
5G promotions change frequently and often include limited-time new-customer offers, so a figure from last month may not be current. Always confirm the price and terms with the carrier or a consultant before you sign.
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