How to Top Up a CMHK Prepaid SIM (2026)

Updated October 2026 · Written by Harry Cheng, founder of china-mobile-phones.com (est. 2003).

This site does not top up Hong Kong numbers for you. This guide shows how to top up directly with the carrier.

“Top up”, “refill” and “recharge” all mean the same thing here: adding stored value to a prepaid SIM. CMHK’s own pages say “refill”, and searchers say all three, so this page uses them interchangeably. You may also see the carrier called CMHK, China Mobile Hong Kong or 中國移動香港, and its app called MyLink.

• Which top-up?
• CMHK
• Balance check
• Mobile Duck, My Friend, Rekanan
• SmarTone, csl, 3HK
• Before you top up
• FAQ
• eSIM option

Which top-up do you need?

“China Mobile top up” can mean two different things. A Hong Kong number (+852) belongs to CMHK and is topped up as described on this page. A mainland China number (+86) belongs to China Mobile in mainland China and is topped up through a different system; see the mainland China top-up guide. If you are not sure, check the country code on your SIM’s packaging.

Which method suits you?

Top up a CMHK prepaid SIM

Online refill (refill page or MyLink)

The quickest route. Open CMHK’s online refill page or the MyLink app, enter the prepaid mobile number, choose one of the fixed amounts from HK$50 to HK$1,000, and pay. CMHK advertises up to 30% bonus on online refills for a limited time (“valid until further notice”), but only on designated cards. It says online top-ups support up to 14 commonly used Hong Kong payment methods; if your overseas card is declined, use a voucher. The page also has a Refill Voucher tab and a box for a coupon code under “Redeem Rewards”.

1. Have the prepaid number ready. Find the Hong Kong mobile number of the CMHK prepaid SIM you want to refill.
2. Open the refill page or MyLink. Go to CMHK’s online refill page, or open the MyLink app and choose the prepaid card refill function.
3. Enter the number and amount. Enter the prepaid mobile number and choose one of the fixed amounts, from HK$50 to HK$1,000.
4. Pay. Pay with one of the listed Hong Kong payment methods. If your card is declined, use a refill voucher instead.
5. Check balance and data plan. Check your stored value and validity, and re-subscribe to a data package if your plan has lapsed.

From CMHK’s top-up page. Designated cards are the HK$48 Mobile Duck 4G Local Prepaid Card (97) and the HK$120 Mobile Duck One Card for Three Regions (98 and 109). The offer is not available on MySIM, Teman (CT20), Kids Watch Greater Bay Area 365-Day, SIMPLIFLY or the Mobile Duck Card. An additional one-time bonus may be added, and its amount varies by card; check the CMHK website or your SIM pack. Each refill extends validity from the refill date, and if your original validity is longer, that one applies. Since 14 March 2025 a prepaid card’s balance is capped at HK$5,000, and a refill is rejected if it would take you over (bonus included). Offers change, so confirm on the page before paying.

Refill voucher

Buy a voucher at a CMHK shop or authorised dealer, then redeem it with the instructions printed on it. Face values include HK$20, HK$50 and HK$100, depending on the SIM brand. When a voucher is redeemed against a top-up, CMHK works out the validity extension from the net amount you actually paid, not the voucher’s face value. You can redeem a voucher with *139*[16-digit code]# even while roaming abroad. Use the right voucher for your SIM: a Rekanan or My Friend voucher will not work on other CMHK cards.

In a CMHK shop

Staff can refill your SIM, and CMHK shops have Octopus self-service payment machines. On some cards the Flexi-Fill service lets you choose any amount from HK$10.

Check your balance and expiry

CMHK’s prepaid user guide, which covers CMHK prepaid numbers, gives these free balance checks: log in to the MyLink app, dial *#130#, or dial 193193. CMHK’s customer FAQ says 193193 plays your remaining balance and expiry date, and gives 197197 for Kabayan or Rekanan cards. Dial *140# (free) for service information and tariffs. You can also use the CMHK website or call the prepaid customer hotline on 12580 and choose the refill methods menu. If you refill before the SIM expires, your remaining balance carries forward; after expiry it is forfeited.

If a new SIM won’t activate or connect

CMHK’s guide says to insert the SIM into a smartphone and turn on mobile data in Hong Kong, or dial *#130# in Hong Kong. On success, an SMS tells you the Hong Kong number, stored value and expiry date. If that doesn’t work, restart the phone and check that the mobile data APN is cmhk, with the proxy address and port left blank.

PPS

PPS is a Hong Kong bill-payment service (phone and web). CMHK lists it for some cards, with a HK$30 minimum on the HK$88 Mobile Duck plan. You need a registered PPS account.

A refill adds stored value, not always data

Monthly plans are deducted from your stored value. CMHK’s terms say that if the balance is too low to renew a plan, the service stops, and you must have enough stored value and subscribe again.

If a card already has a longer validity left, the longer period applies. Rules differ by SIM and change, so check the page for your SIM on CMHK’s site.

Mobile Duck, My Friend, Rekanan, Kabayan and Teman

These are separate CMHK prepaid brands, and they are the ones people most often search for. The main difference is the refill route and whether the online bonus applies.

Mobile Duck recharge and refill

Mobile Duck is the name on CMHK’s own prepaid range, including the HK$48 Local Prepaid SIM and the HK$88 Local Monthly Plan. Refill online, in MyLink or in a CMHK shop. CMHK’s online-refill bonus applies only to designated Mobile Duck cards (the HK$48 4G Local Prepaid Card and the HK$120 One Card for Three Regions), so check CMHK’s list before choosing an amount.

My Friend recharge card and Rekanan voucher

Use the Rekanan/My Friend refill voucher. Press *139*, the 16-digit code, then #; or call 67001111 and follow the prompts; or use MyLink’s refill function. The voucher works only for Rekanan, My Friend and the IDD1523 SuperSave service. CMHK’s page says to check the product details for any Kabayan or Rekanan refill bonus; My Friend is not on its list of designated cards.

Rekanan and My Friend balance check

To check your balance and expiry date, log in to the MyLink app, dial *#130# (free), or dial 193193 (free), as CMHK’s prepaid user guide says for CMHK prepaid numbers. CMHK’s customer FAQ gives 197197 for Kabayan or Rekanan cards. If a code returns nothing, use the CMHK website or the prepaid hotline 12580. Refill before the expiry date, or your balance is forfeited.

Kabayan and Teman

Kabayan can be refilled with vouchers, at a CMHK shop (including Octopus machines and Flexi-Fill) and through PPS. CMHK lists Kabayan under “Discontinued Cards for Foreigners”, which suggests new cards are no longer sold, so confirm with CMHK before relying on one. Teman (CT20) is listed on CMHK’s page as not eligible for the online-refill bonus; this guide found no separate top-up instructions for it, so ask CMHK.

SmarTone, csl and 3HK

Each of these carriers has its own refill system. Balance-check codes can differ by SIM, so if a code below does not work, use the one printed on your SIM pack or the carrier’s page for your card.

China Unicom Hong Kong and other smaller carriers are not covered here.

Before you top up

• Register the SIM. Hong Kong prepaid SIMs need real-name registration before use, and SmarTone and 3HK say so on their pages.
• Match voucher and SIM. Vouchers are brand-specific. Check the name on the voucher.
• Keep the SIM active. A SIM that sits unused can expire; refill within the validity period.
• Use the carrier’s own channels. Third-party resellers sell vouchers, but check the face value and brand before paying.

Related guides: Hong Kong SIM card guide, China Mobile Hong Kong roaming activation, Hong Kong IDD call rates, CMHK voicemail and call forwarding codes.

Frequently asked questions

Need data or a number rather than a top-up?

How this page was put together

This guide was checked on 30 October 2026 against the carriers’ own pages: CMHK’s online refill page, prepaid user guide, customer FAQ and SIM pages, SmarTone’s and csl’s prepaid pages and 3HK’s prepaid pages. CMHK’s site blocks automated reading, so some CMHK details come from search results of those official pages and from CMHK’s prepaid user guide text supplied to me. Balance codes, bonus terms and validity change by SIM and over time, so confirm on the carrier’s page before topping up. Details I could not confirm, such as China Unicom Hong Kong, are left out rather than guessed.

Sources:

• CMHK prepaid card refill page
• CMHK prepaid SIM top-up page
• CMHK prepaid card user guide
• CMHK prepaid customer FAQ
• SmarTone prepaid top-up methods
• csl prepaid SIM recharge methods
• 3HK SoSIM FAQ

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