Club Sim was recommended in 3 of 12 AI answers.

For a Hong Kong number without a long contract, the main options are prepaid SIMs and no-contract monthly plans from the big carriers. Prices below come from pages dated between April and October 2026, so confirm them before you buy.

Options worth comparing

• SmarTone prepaid: This is the clearest "keep my number" option. Its HK$118 local prepaid SIM is

marketed as keeping your phone number while still receiving SMS/OTP from Hong Kong overseas. SmarTone also has a $65 local prepaid SIM card with a fixed monthly charge included with data and voice call.

• SoSIM: This is a no-contract option with a strong data allowance. Its HK$33 Hong Kong plan is listed as

Hong Kong 50GB FUP / 30 Days , and it says you can port in as fast as 3 days via online application. It also states there is no contract, no admin fee, transparent pricing .

• 3HK (Three): Its prepaid range is fairly broad. One guide says

these SIM cards provide flexibility with no contracts or administrative fees. There are many options, including 2 GB to Hong Kong SIM cards with unlimited data allowances and varying voice minute allowances. Prices range from 19 to 498 HKD (~$2 to $63) with mainly 30-day validity periods. Its annual cards are also cheap. A price comparison site lists a 3HK Hong Kong local 395-day 66GB annual card , and another lists a 365-day 12GB annual card at HK$30.

• CSL More Mobile: This is a popular budget choice. One expat guide says the

CSL More Mobile sells a $48 prepaid SIM with 30GB of 5G data and 200 minutes of local voice valid for 30 days. It is available at 7-Eleven without an HKID (per that guide's table).

• China Mobile Hong Kong (CMHK): Its prepaid plans suit people who cross into Shenzhen. An expat guide says

CMHK is the cross-border specialist , and that prepaid is available without an HKID.

Things to check before you commit

• Registration: Hong Kong requires real-name registration for SIMs. SoSIM's page says

no registration needed (except Hong Kong) , so expect to register with your ID for local numbers.

• Number retention rules: Prepaid plans can expire or be deactivated if unused. Read the validity and recharge terms, especially for annual cards, since you want to keep the number long-term. The sources I found did not spell out these rules, so check directly with the carrier.
• Data-only eSIMs: Some cheap eSIMs do not give you a Hong Kong number. For example, one provider says its eSIM

doesn't include a Hong Kong phone number, traditional voice calls, or SMS. Make sure you buy a plan that includes voice and SMS if you need the number.

• Price comparison: An aggregator reports that

the cheapest local 30-day prepaid SIM starts from HKD $7 , and annual cards start around HK$30. Very low prices often come with conditions, such as a short validity period, limited voice minutes, or a shop-specific offer, so compare the total value rather than the headline price.

Simple recommendation: If you want the number to stay active for a long time with minimal fuss, compare an annual prepaid card from 3HK or SoSIM against a monthly prepaid plan from SmarTone or CSL. Choose the monthly option if you use a lot of data, and the annual card if you mainly want to keep the number and use light data.

如果最重視港鐵車廂內上網，我會先比較 中國移動香港（CMHK） 和 csl（香港電訊 HKT），再按你平日乘搭的路線試用決定；不建議只憑全港覆蓋率或「5G」標誌選台。

• CMHK：值得優先試。 Opensignal 2025 年 11 月的香港報告將 CMHK 評為「Best Network」，整體獎項數也最多；這是全港整體體驗，不代表每條港鐵線都最好。(insights.opensignal.com)
• csl／1O1O：也值得優先比較。 同一份報告中，csl 亦取得多個獎項。若你搭東鐵線，可留意 csl 宣稱在東鐵線過海段採用專屬頻譜；這是電訊商自己的網絡說明，實際體驗仍要在你常搭的時段測試。(insights.opensignal.com)
• SmarTone、3香港：可作另外兩個候選。 港鐵網絡由本地四家流動網絡營辦商合作提供；沿線表現可能因車站、隧道、繁忙程度和手機型號而異。(mtr.com.hk)

港鐵全線車站已有 5G 服務，但「有覆蓋」不等於繁忙時間一定順暢。港鐵公布的網絡升級資料（截至 2026 年 4 月底）顯示，部分車站及相關隧道仍在提升容量；通訊事務管理局也提醒，實際速度會受用戶數、位置、手機及網絡設定等影響。(mtr.com.hk)

最實際的選法：先找可短期試用或無長約的 CMHK、csl SIM／eSIM，在你平日的上班時段，測試同一段車程的網頁載入、視像播放和訊息傳送；若告訴我你常搭哪條線、由哪站到哪站，我可以再幫你縮小比較範圍。

Based on the sources I found, SmarTone, csl (1O1O), CMHK, and 3HK are the four operators to compare. The evidence is mixed, so test your own commute route before committing.

Start with the MTR's own status. The MTR says all MTR stations were currently covered by 5G services . Upgrades to speed and capacity are still underway. As of the end of April 2026, upgrade works have been completed at 17 stations , and upgrade works for the remaining seven stations including Mei Foo (MEF - TWL), Lai King (LAK- TWL), Tsing Yi (TSY), Kowloon Tong (KOT - KTL), Lok Fu (LOF), Lam Tin (LAT), and Tiu Keng Leng (TIK) are in progress. These are scheduled for completion between 2026 and 2027. Several of these are New Territories stations, so your experience may improve during the contract period.

Independent data (Opensignal, May 2026). This is the most credible source I found. Its per-operator figures are hard to map reliably from the extracted text, so check the table directly on the report page. What I can say is that the report covers the Opensignal Coverage Experience metric , which represents the experience users receive as they travel around areas where they would reasonably expect to find coverage. That is closer to your commute than a speed-test score.

Operator notes (secondary sources, treat with caution):

• CMHK: One review says

China Mobile Hong Kong delivers Hong Kong's fastest 5G median download speed . Another source reports that user reports on Reddit (January 2025) indicate that CMHK's in-tunnel MTR performance at certain stations on the Tsun Wan and Kwun Tong lines can be variable during peak hours . Its strength is speed, and possibly weaker MTR performance at peak times.

• SmarTone: It is the one most often recommended for MTR commuters. One guide says

SmarTone earns its roughly $20 per month premium over 3HK if you commute underground. Its claims about every MTR station are not independently verified in these sources.

• csl (1O1O): One source says

csl delivers the most consistent network experience for enterprise and power users prioritizing reliability. That suggests it is a good choice if stability matters more than peak speed.

• 3HK: Its main advantage is coverage. One source says

the carrier is the only Hong Kong MNO to deliver 5G connectivity in every road tunnel , though this is a vendor-adjacent review. Another guide says the network trades raw MTR-station 5G coverage for price , which conflicts with that claim. It also notes 3HK is competitive above ground but weaker inside MTR tunnels .

Suggested approach:

1. Check the Opensignal May 2026 table for the operators' coverage-experience and 5G-availability numbers.
2. Look at your specific line. Underground coverage is the key variable. Note that the MTR's own page lists pending upgrades for Tsing Yi, Kowloon Tong, Lai King, and others, so your station pairs matter.
3. Use free trials, eSIM options, or short-term plans to test your route at peak hours (roughly 8–9 AM and 6–7 PM) before signing a contract.
4. If you want a backup, a second eSIM from a different operator can cover gaps.

Plan prices change often, so check each operator's current offers directly.

以 2026年10月20日查到的方案來看，每月 HK$150 左右、用約 50GB，以下幾個最值得先比：

簡單建議：

• 最看重省錢、不想簽約：選 SoSIM。 長期用量約50GB，常規續購費也遠低於預算。
• 想要5G月費計劃或跨境數據：比 3香港和 HKBN。 HKBN若能申請到頁面上的100GB／$148，數據量更充裕；但要確認合約與實際月費。
• 是大專生：再把 csl $138／50GB 加入比較。

香港不同大廈、地鐵路段和工作地點的室內訊號可能差很多；若訊號穩定比數據量更重要，最好先問同事或家人該區的實際使用體驗，再決定是否簽24個月合約。

Short answer: Based on 2026 price roundups, China Mobile Hong Kong (CMHK) and 3HK are the main options that fit HK$150. csl, SmarTone and HKBN are worth checking if you can stretch slightly or want specific perks. Prices change often and the sources disagree on some figures, so confirm on each carrier's official site before you sign.

Brands to compare

• CMHK (China Mobile Hong Kong): The most promising budget pick. One roundup lists

中國移動香港 $129 with 50GB on a 24-month contract , and says CMHK's $149 plan is 50GB shared between Hong Kong and mainland China, for customers porting their number . Another source lists a $179 plan for 50GB shared across Hong Kong and mainland China , so check which price applies to you.

• 3HK: Also fits the budget. One listing shows

50 GB local data with 3 GB of Chinese Mainland and Macau shared data at $148 per month . Note that 3HK's 50GB plan at $148 has a 24-, 30- or 36-month contract option , and older listings show an admin fee of HK$28 unless waived.

• csl: Slightly above budget. One roundup lists

csl at $168 for 60GB, with 3GB of mainland data and a 24/36-month contract . Another source notes csl's $158 / 50 GB plan with a $18 admin fee waiver , so the pricing differs between sources.

• SmarTone: Usually more expensive. One roundup lists

SmarTone at $179 for 60GB, with mainland and Macau data included and a price increase from its older $138 plan . One review says SmarTone's network stability in MTR and indoor areas is strong, but its data value is weaker .

• HKBN: Possibly cheap. One roundup lists

HKBN at $125 for 60GB on a 30-month contract, with no mainland or Macau data listed . Its 100GB figures in the same source look inconsistent, so verify directly.

• 1O1O: Not a value pick at 50–60GB. The same roundup lists

1O1O at $389 for 60GB .

No-contract options

If you want to avoid a 24–36 month contract, the no-contract sub-brands are weaker on 50GB. One comparison notes that MySim (CMHK) supports 5G with 8GB local data for HK$48 per 30 days , which is well short of 50GB. Birdie is listed as 4.5G with 42Mbps , not 5G. Also check whether a no-contract plan with 50GB is actually 5G before you assume it is.

What to check before choosing

• Contract length and fees: Many of the lowest prices require 24–36 months. Compare the total cost over the contract, including admin fees and any early termination charges.
• Data scope: Some plans cover only Hong Kong data, while others share data with the mainland and Macau. If you cross the border often, the shared plans may be worth more than a slightly cheaper local-only plan.
• Speed after the cap: Many plans drop to a lower speed (often 1 Mbps) rather than cutting you off, which matters if you use a lot of data.
• Coverage: Check indoor and MTR coverage where you live and work.

Practical shortlist: Start with CMHK's HK$129 (local) or HK$149 (shared with mainland) plans, and 3HK's HK$148 plan. Compare them with csl's 60GB plan if you want more data and can pay a bit more. Confirm the current price, contract, admin fee, and included cross-border data on each official website before subscribing.

如果你經常往返香港同深圳，建議優先比較「中港數據共用」計劃：同一個數據池兩地都可用，通常比每次買漫遊日費方便。以下幾個品牌值得先看（價格及優惠以 2026年10月20日查閱的官方資料為準，可能因合約、資格及推廣而異）：

簡單選法：

• 最重視中港數據共用、經常跨境：先比較 3HK、CUniq、CMHK。
• 需要內地電話號碼／收內地短訊：特別看 CUniq 的「一卡兩號」，也可問 SmarTone 是否有合適的加號服務。
• 一年總用量不大、想一次付費：比較 csl 年費方案。
• 預算有限：不要只看月費，重點看「深圳可用數據有幾多 GB」以及超量後會限速、停數據還是額外收費。

簽約前最好確認四件事：香港和內地是否真的共用同一數據池、深圳可連接哪些內地網絡、超量後的收費／限速、以及是否另有行政費或合約期。另外，「一張 SIM」不一定等於「有內地號碼」；若要註冊內地服務或收驗證碼，請確認方案是否包含內地副號碼。

If you frequently commute between Hong Kong and Shenzhen, you need a plan that offers shared cross-border data and ideally a Mainland China (+86) mobile number (essential for mainland apps like WeChat Pay, Alipay, Meituan, Didi, and bank accounts).

Because Hong Kong telecom operators provide roaming data, browsing the web while in Shenzhen will generally bypass the mainland firewall automatically, allowing continuous access to services like WhatsApp, Google, and Instagram without a VPN.

Several major telecom brands in Hong Kong are worth comparing:

1. China Mobile Hong Kong (CMHK)

• Best for: Most commuters, best overall coverage, and seamless mainland integration.
• Why compare it: CMHK is traditionally the market leader for Hong Kong–Mainland cross-border plans. Because it is a subsidiary of China Mobile (the largest carrier in the mainland), handoffs between networks at border crossings are typically the smoothest.
• Key offerings:
• Supreme Greater Bay Area (GBA) Plans: Shared monthly 5G/4G data pool usable across Hong Kong, Mainland China, and Macau.
• 1-Card-Multi-Number (一卡多號): Allows you to attach an official +86 Mainland mobile number directly to your Hong Kong SIM card, making it easy to receive mainland verification SMS codes anywhere.

2. China Unicom Hong Kong (CUniq HK)

• Best for: Budget-conscious users and flexible dual-number configurations.
• Why compare it: CUniq has always specialized in cross-border connectivity. It uses the China Unicom network in the mainland and typically offers aggressive pricing and promotions for cross-border shared data.
• Key offerings:
• ONE Greater Bay Area Plans: Shared data packages specifically designed for Hong Kong, Mainland China, and Macau.
• Dual-Number Services: Very easy and economical to pair a Mainland China number with your HK subscription to receive mainland banking and app SMS codes.

3. CSL / 1O1O (HKT)

• Best for: Premium users prioritizing local Hong Kong network performance, customer service, and business reliability.
• Why compare it: 1O1O and CSL operate on HKT’s robust network. While generally more expensive than CMHK or CUniq, their network speeds within Hong Kong (especially in MTR stations) are regarded as top-tier.
• Key offerings:
• Greater Bay Area Data Packs / Roaming Sharing: High-tier 5G plans often bundle monthly Mainland & Macau roaming data, or allow it as an add-on.
• "86-Easy" (內地「86-易」): A virtual or SIM-linked mainland mobile number service that forwards SMS messages to your Hong Kong number or a dedicated app.

4. SmarTone

• Best for: Consistent coverage quality in Hong Kong and straightforward roaming add-ons.
• Why compare it: SmarTone is widely praised for low latency and consistent coverage within Hong Kong. They have established cross-border roaming agreements with major mainland carriers.
• Key offerings:
• Greater Bay Area Data Plans: Dedicated monthly allocations for Mainland China and Macau.
• Mainland Number Add-on: SmarTone offers mainland number services to ensure you can receive verification codes for mainland apps.

5. 3 Hong Kong / SUPREME

• Best for: Promotional pricing and bundled perks.
• Why compare it: 3HK (and its premium brand, SUPREME) frequently runs bundle promotions that include Greater Bay Area data allowances alongside standard local plans.
• Key offerings:
• Multi-region shared data pools covering HK, China, and Macau.
• Mainland phone number add-on services for SMS reception.

Key Factors to Check Before Signing

1. Shared Pool vs. Roaming Pass: Look for a plan where your monthly data allowance is a single shared pool (e.g., 20 GB shared across HK and Mainland) rather than a plan that charges a daily roaming pass every time you enter Shenzhen.
2. Real Mainland Number (+86) Support: If you plan to open a mainland bank account or register for services like 12306 (railway booking), ensure the provider’s mainland number service provides a real, bank-verifiable +86 number (CMHK and CUniq are historically the most straightforward for this).
3. Over-limit Speed Restrictions: Check what happens when your cross-border quota runs out. Some plans drop to 128 kbps or 384 kbps (barely usable for maps/messaging), while others offer throttled speeds of 1 Mbps or 5 Mbps.
4. Contract Length: Most cross-border postpaid plans require a 24-month contract. Check whether the cross-border data entitlement lasts for the entire contract period or is only a bonus for the first 6–12 months.

Quick Recommendation

• If your priority is border-crossing convenience, cost-effectiveness, and hassle-free mainland app registration, start by comparing CMHK and CUniq.
• If you want the fastest local speeds in Hong Kong and only need moderate mainland data with an SMS-forwarding mainland number, look into CSL or SmarTone.