Network & coverage
CMHK rides its parent's national network natively: inside mainland China your phone registers on China Mobile itself rather than a roaming partner, which is why rural-mainland reach is the deepest of any HK carrier. At home, third-party benchmarks (Opensignal, Nov 2024) put CMHK level with csl on overall coverage experience (8.7/10) and ahead of all four operators on 5G availability.
csl is the HKT (Telstra group) flagship brand with a long-standing reputation for in-building penetration on dense urban Hong Kong. Its 5G runs at full speed including standalone and mmWave where deployed — unlike most budget plans, there are no artificial speed caps on mainstream tiers.
Pricing & contracts
CMHK positions aggressively on price: local 5G entry plans have sat around HK$98/month, "one-card-two-places" bundles from roughly HK$149 and three-place (HK+CN+Macau) from about HK$199, typically on 12–24 month terms. csl remains contract-led — 24/36-month commitments with an HK$18/month admin fee — and street prices only approach sub-brand territory on promotional tiers.
Device financing matters here: csl sells handset instalment bundles through its stores that CMHK largely doesn't match, so total cost of ownership can flip depending on whether you buy a phone alongside the plan.
Cross-border & extras
This is CMHK's home turf: one-card-two-number plans bundle a free +86 mainland number with shared CN data (roughly HK$139–159 on 24 months), and a secondary-number add-on costs around HK$18/month otherwise. Dedicated elderly and student plans round out the value story.
csl answers with ecosystem perks rather than border features: Now TV channel packs, The Club loyalty points, HKT Wi-Fi hotspot access, paid Additional SIM sharing and full walk-in retail servicing across its store network.
China Mobile HK
Choose CMHK if you cross the border weekly, want the cheapest credible 5G contracts, or need a mainland number without carrying two phones.
csl
Choose csl if in-building signal tops your list, you want Now TV/bundle perks or handset financing, or you value face-to-face service.
