A Hong Kong SMS platform built and operated by UD, ready to use the moment you log in, with nothing to install. A single account runs two product lines on shared reporting and billing, all prepaid and with no monthly fee.
Bulk A2P promotional SMS for campaigns, CRM outreach, and retail and e-commerce alerts.
Two-factor authentication and one-time passwords delivered over high-priority Tier-1 routing, with API integration built in.
Prepaid packages valid for 6–12 months, with no monthly fee. Local +852 sending includes SSRS registration; +86 and international destinations are quoted separately.
Standard prepaid packages are self-service in the console. For SMS API access, a custom sender ID, or two-way SMS, just fill in the form below.
Global CPaaS is stronger on multi-channel integration and broad coverage, mostly PAYG or monthly subscription. UD focuses on Hong Kong compliance and irregular cadence: prepaid packages, handled SSRS sender-ID registration, automatic DNCS filtering, tri-lingual support, and HKD billing. For global multi-channel volume, choose CPaaS; for local compliance and a single point of contact, UD fits better.
SSRS (SMS Sender Registration Scheme) is a sender-ID registration scheme launched by OFCA in December 2023, opened to all sectors from February 2024. SSRS-registered alphanumeric sender IDs display with a leading “#”; unregistered “#”-prefixed messages are blocked by local carriers. For enterprise senders it is effectively mandatory; UD handles registration in about 18 business days.
Industry data puts SMS delivered-and-read rates at 90–98% (usually within 5 minutes), well above email’s 20–30%. Keep in mind this measures “delivered and viewed”, actual response still depends on your copy, timing, and targeting. Rich-messaging channels such as RCS and WhatsApp Business are growing fast in 2026, so if your audience skews toward iPhone users or WhatsApp-heavy markets, it is worth running a parallel strategy.
2FA / OTP packages use high-priority Tier-1 routing for better deliverability and latency than mixed routing, ideal for authentication, login prompts, and one-time passwords; per-message price is higher than standard. SMS API integration is included by default with 2FA / OTP packages. One account can use both at once.
Before each send, the platform filters recipient numbers against the DNCS opt-out database. Senders must first obtain explicit consent for direct marketing (PDPO Part VIA) and include opt-out instructions in every message (UEMO requirement). Penalties for breaching PDPO direct-marketing rules reach HK$500,000 and 3 years’ imprisonment; transferring personal data to a third party for gain raises this to HK$1,000,000 and 5 years.
Click “View pricing” to choose your product line and package, pay in the console, and start sending straight away. For SMS API integration, a custom sender ID, two-way SMS, or a larger enterprise integration, submit the form on this page and a UD consultant will be in touch to arrange technical onboarding and a quote.