Which mobile-service brands or prepaid SIMs should I consider if I want to keep my Hong Kong number without a long contract?

SmarTone says customers can subscribe online and transfer an existing mobile number without first asking their current operator to terminate it. Keep the number active throughout the transfer. The company says processing generally takes about seven days and allows registration up to 150 days in advance. Monthly-plan subscribers should be the registered number holder and have an existing contract that has ended or is nearly over; prepaid customers should keep the SIM unexpired with at least HK$1 balance. If the number is registered to a family member, that person should provide the relevant transfer information.

The listing invites customers to select a monthly plan, and SmarTone describes eSIM activation by scanning a QR code provided by the company. The available information does not say that these monthly plans are contract-free, so buyers who want to avoid a long commitment should confirm the plan’s contract term before subscribing.

csl offers prepaid options rather than only monthly service plans. Its HK Mobi 5G prepaid SIM page lists 365-day cards, including a version with 50GB of local data and another with 80GB, as well as local voice minutes. This can suit someone who prefers a prepaid validity period to a multi-year monthly commitment; check the card’s current terms and validity before purchase.

csl also lists local prepaid data passes, including a 30-day HK$48 option with 50GB. The data pass renews every 30 days, and unused data does not carry over. Buyers prioritizing retention of an existing number should confirm the number validity, recharge requirements and port-in process for the particular SIM.