Suitable for: **Short-term business travelers in the Greater Bay Area:** Frequent travelers between Mainland China, Hong Kong, Macau, and Taiwan who need a Hong Kong phone number for receiving local calls and occasionally need to handle business in Mainland China or Taiwan/Macau, using data for map browsing or email. **Cross-border online shopping and registration users:** Require a Hong Kong mobile number to register accounts for various overseas or Mainland China apps, receive verification codes, and handle occasional cross-border roaming internet access. **Light internet travelers:** Primarily use Wi-Fi, only for research, social media, and messaging apps. 68GB (including shared data packages) is sufficient for medium- to long-term trips or multiple short trips. **Users with a secondary SIM card/backup phone:** Users who prefer their primary number but need a secondary SIM card for specific cross-regional communication. This type of annual SIM card with a pre-installed number eliminates monthly fees.

Hong Kong Unicom Greater China Data SIM Card 68GB/180 Days with Number (Unlimited Speed, Unlimited Use, Discontinued After Usage) This card is valid from the day after activation until 23:59 Hong Kong time on the 180th day (a total of 180 days). Supported Apps: WhatsApp, Telegram, TikTok, Instagram, etc. Activation Method: Automatic activation upon insertion, no complicated operation required. Check Data Usage: Dial 77850# or 11855# or check via your mobile phone settings menu.