1O1O was recommended in 3 of 12 AI answers.

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。

Since you cross often, the most useful option is a plan that includes Mainland China data on a Hong Kong number. A standard Hong Kong plan stops working at the Shenzhen border. A Hong Kong SIM or eSIM does not work once you cross into Shenzhen, and vice versa. Here are the main carriers to compare. Prices and terms come from third-party guides and carrier pages, so check the current offers before you sign up.

1. China Mobile Hong Kong (CMHK) This is the strongest fit for weekly Shenzhen trips. Its Greater Bay Area plans include free data roaming in Mainland China (5G) and Macau (4G) , and one guide says that CMHK almost always wins once you do the maths over a 12-month period. Compare its total monthly cost against a cheaper base plan plus roaming add-ons.

2. China Unicom Hong Kong (CUniq) This is a shared-pool option. One guide reports that China Unicom HK offers shared data plans starting from HK$398 per month for 30 GB of combined Hong Kong and mainland China data . The same source notes that these are contract plans (typically 24 months) , so check the commitment before you commit.

3. 3HK (Three) This is the value option. One source says its flagship $88 per month plan bundles 32GB of local data, an additional 2GB shared with Mainland China and Macau . That mainland allowance is much smaller than CMHK's, so it suits lighter cross-border use.

4. SmarTone Mainland roaming here is limited to higher tiers. One guide says a mid-tier $148 plan adds 5GB of Mainland and Macau roaming data . Choose it mainly if strong 5G coverage matters to you.

5. CSL (HKT group) CSL's 5G plans list Mainland China and Macau roaming, but the terms say the roaming package must be subscribed separately and that the customer has activated IDD, roaming service and subscribe to Data Roaming Day Pass service . Read the fine print before relying on it.

Other options to know about

• eSIM from a regional provider (for example Roami or Airalo): these can cover both places, but they're better for occasional trips than daily commuting. One guide notes that

a China-only eSIM plus a Hong Kong-only eSIM is almost always cheaper than a regional plan that covers all three .

• Prepaid SIMs: if you consider one, note that 7-Eleven says

from 17 June, 2026, all prepaid SIM cards do not support Activation in Chinese Mainland. Activation has to happen in Hong Kong.

How to choose

• If you cross most weeks, start with CMHK's Greater Bay Area plan and compare its price with 3HK plus add-ons.
• If you cross occasionally, 3HK or a regional eSIM may cost less.
• Check whether the mainland allowance is shared or separate, whether it is 4G or 5G, and whether the contract is 12 or 24 months.
• Confirm your phone supports dual SIM or eSIM, so you can keep a second line active.

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。

With a monthly budget of HK$150 and a target of ~50GB of data, you are in one of the most competitive segments of the Hong Kong mobile market. You have two main routes: no-contract digital/prepaid SIMs (maximum flexibility and zero hidden costs) or contracted postpaid 5G plans from major carriers (higher speeds, network priority, and cross-border roaming perks).

1. No-Contract & Digital Brands (Highest Flexibility)

These are ideal if you do not want to be tied to a 24-month contract or pay the standard HK$18/month telecom administration fee.

• SoSIM (operates on the 3HK network)
• Typical Cost: HK$33 – HK$60 / 30 days.
• Why Consider It: Unbeatable value. You can easily get 50GB of local data for as low as HK$33–$50 per renewal. Available digitally (eSIM) or at convenience stores (PARKnSHOP, Watsons, 7-Eleven).
• Downside: Operates as prepaid; data traffic has lower network priority in crowded areas compared to full postpaid subscribers.
• Birdie / 自由鳥 (operates on the SmarTone network)
• Typical Cost: ~HK$130 – HK$150 / month.
• Why Consider It: 100% digital app management, zero admin fees, and no contract. It is famous for Data Rollover (unused data carries over to the next month) and P2P data trading with friends.
• Downside: Data speed is mostly 4.5G (usually capped around 21–42 Mbps or 4.5G full-speed depending on tier promotions) rather than pure 5G.
• Club Sim (operates on the HKT / csl network)
• Typical Cost: HK$58 – HK$128 depending on data packs.
• Why Consider It: Modular month-to-month plans powered by HKT’s robust network. No hidden administration fees.

2. Major Telecom Operators (5G Postpaid Contract Plans)

If you switch your existing number (MNP - Mobile Number Portability) or sign up via their official e-shops, you can easily secure 5G plans with 50GB within HK$100–HK$150.

• China Mobile Hong Kong (CMHK)
• Estimated Cost: ~HK$98 – HK$129 / month (with online / MNP promotion, 24-month contract).
• Why Consider It: Consistently aggressive on price for 5G. Most CMHK 5G plans in this tier include 30GB–50GB of local data plus 2GB–5GB of shared Mainland China & Macau roaming data.
• Best For: Users who travel frequently to Shenzhen or Macau.
• 3 Hong Kong (3HK)
• Estimated Cost: Net average ~HK$128 – HK$148 / month (often with months waived on 24- to 30-month contracts).
• Why Consider It: Offers large data bundles, occasional MoneyBack loyalty perks, and generous cross-border roaming allowances.
• Alternative: 3HK also offers the DIY SIM, which lets you configure 30-day recurring 4.5G/5G bundles online without a multi-year commitment.
• SmarTone
• Estimated Cost: Promotional port-in plans around HK$98 – HK$139 / month (30GB–60GB).
• Why Consider It: SmarTone is widely praised for stable indoor and MTR (subway) reception across Hong Kong.
• Alternative Sub-brand: Check ValueGB (prepaid annual SIM on SmarTone's network), where you can buy ~80–100GB of yearly data for around HK$120–$150 total.
• csl / SUN Mobile (HKT Group)
• Estimated Cost: Standard csl contracts are usually higher (HK$160+), but SUN Mobile (HKT’s budget sister brand) or csl’s promotional plans (e.g., student/under-29 "Go! Chill" plans) frequently hit HK$98–HK$138 for 50GB–60GB.
• Why Consider It: Reliable network coverage using HKT base stations.

Comparison Checklist Before You Sign

1. Administration Fee (行政費):

• Traditional telecom contracts typically charge HK$18/month on top of the advertised plan fee. Always verify whether this fee is waived (usually granted for online registration or number porting).

2. Fair Use Policy (FUP / 限速):

• Check the throttled speed after using your 50GB. A plan that throttles to 1 Mbps – 5 Mbps is still usable for messaging and web browsing; plans that throttle to 128 kbps are practically unusable for anything other than basic text.

3. Cross-Border Roaming Data:

• If you spend weekends in Shenzhen or Guangdong, CMHK and 3HK often bundle 2GB–5GB of China/Macau roaming data for free within this budget range.

4. Real-Name Registration:

• Under Hong Kong law, whether you choose a contract plan, digital SIM (Birdie/Club Sim), or prepaid card (SoSIM), you must complete real-name verification (HKID or valid passport) before the card activates.

Quick Summary Recommendation

• Cheapest, no commitments: SoSIM (Well under HK$100 for 50GB).
• No contract, best customer experience & rollover: Birdie.
• Fastest 5G with cross-border data: CMHK or 3HK (via online MNP promotion).
• Best underground/MTR reception: SmarTone (look for promotional port-in 5G packages).

可以。香港流動號碼一般可攜去另一家電訊商；重點是申請轉台時，舊號碼要仍然有效。以下幾個選擇較值得先看（價格以我查到的 2026年10月20日 官網資料為準，優惠可能變動）：

簡單選法：

• 想用預付、自己買套餐：先比較 SoSIM 和 Club SIM。
• 想用少量數據並按月付費：看看 Birdie 的低用量方案。
• 你現在是 3HK 號碼：SoSIM 不適用，先比較 Club SIM 或 Birdie。

轉台前留意：

1. 不要先取消舊號碼；由新電訊商辦理攜號轉台。通訊辦指出，號碼一旦終止，可能就不能再攜走。(ofca.gov.hk)
2. 若舊號仍在合約期，轉台前先問原電訊商是否有提前終止費；新方案無合約，不代表舊合約費用會免除。
3. 儲值卡和新月費卡都須完成實名登記；如果是儲值卡，記得留意卡／號碼有效期及續購期限。(ofca.gov.hk)
4. 若主要是保留號碼收銀行短訊或人在海外使用，購買前再確認該品牌的漫遊、收 SMS 和維持號碼有效的條件。

如果你告訴我你目前是哪家電訊商、每月大約用多少數據，以及是否需要人在海外收短訊，我可以再幫你縮小到一兩個最合適的選項。

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.

想保留現有的香港電話號碼（攜號轉台 MNP），又不想被 12 至 24 個月的長約綁死，最划算且彈性的方式是轉為「低成本儲值卡」或「無合約月費計劃」。

根據「純養號收 SMS」或「平時在香港仍需通話/上網」的需求，以下為最熱門且值得考慮的品牌與選擇：

一、 純「養號碼」首選（年費極低、主要用於在海外/本地接收銀行 SMS 驗證碼）

1. Club Sim（HKT / csl 網絡）—— 最主流、彈性最高的選擇

• 運作模式：無合約預付型 SIM，以「積木式」購買服務組合續期。
• 每年養號成本：約 HK$15 / 年。
• 延續機制：每 365 天內只需在 App 購買任意一項付費組合（例如最便宜的小額數據或服務），卡片有效期就會自動順延 365 天。
• 特色優點：
• 支援線上自助 MNP 攜號轉台。
• 支援 eSIM 與實體卡，在手機 App 即可全流程管理。
• 身處海外時，接收 SMS 短訊免費（非常適合接收網銀、政府機構 OTP 驗證碼）。
• 注意事項：在海外預設不支援傳統漫遊撥打/接聽電話，主要定位為「收 SMS + 外遊數據」。

2. Lucky SIM（行 csl 網絡，MVNO 虛擬網絡營辦商）—— 最省心的多年期方案

• 運作模式：主打 2 年至 3 年長效期的儲值卡/年卡。
• 養號成本：約 HK$138 - $150 / 3 年（平均每月僅約 HK$4 - $5）。
• 特色優點：
• 一次付費即可保證 2–3 年有效期，不用每年記住手動續期。
• 包含少量本地數據與通話分鐘，亦支援海外免費接收 SMS。
• 支援實體卡及 eSIM，多數可透過香港特約代理/網店直接在網上或 WhatsApp 辦理 MNP。
• 注意事項：屬 MVNO 代理發售，日常管理與售後主要依賴經銷商或專用入口，介面不及大電訊商專屬 App 現代化。

二、 需要少量本地數據/通話（彈性無合約）

3. SoSIM（百佳 / 屈臣氏 x 3HK）—— 門市最多、性價比極高

• 運作模式：無合約儲值卡。
• 成本：首月約 HK$33（含 50GB 本地數據及通話），後續可購買月費或特定長效延長包。
• 特色優點：
• 在全港百佳、屈臣氏均有售，App 支援 MNP 轉台與 eSIM。
• 適合如果你每個月留在香港有穩定的上網需求，但完全不想簽固定死約。
• 注意事項：若純粹為了移民放著「極低成本養號」，其續期成本相較於 Club Sim 或 Lucky SIM 會稍高一些。

4. Birdie 自由鳥（SmarTone 網絡）—— 純無合約月費、App 體驗最好

• 運作模式：無合約、按月自動扣款月費計劃。
• 成本：最低純保留號碼/通話計劃約 HK$38 - $48 / 月。
• 特色優點：
• SmarTone 網絡質素穩定。
• 真正的「隨時走、不綁約」，全程在 App 內完成 MNP 申請及信用卡扣款。
• 適合未來幾個月內隨時可能換台、或在香港需要正常通話但暫不確定去向的人。

5. 3HK DIY 儲值卡 / 3國際萬能卡

• 運作模式：儲值卡／年卡形式。
• 特色優點：
• 支援 MNP，可在 App 內自由選購「365日長效本地數據包」或「大灣區/外遊數據包」。
• 如果你經常往返內地、香港或海外，買一張年卡既能養號，又能在回港時有現成流量可用。

總結建議

轉台前提醒：

1. 合約期確認：如現有號碼仍在電訊商合約期內，請確保轉台生效日（Cut-over date）定在合約結束日當天或之後，切勿提早終止以避免違約罰款。
2. 實名登記：香港法例規定所有電話卡（包含儲值卡與 eSIM）均須完成電話卡實名登記，一般使用香港身份證或護照即可在各品牌 App/網頁於數分鐘內完成認證。