Digital maps highlighting the coverage of mobile-phone networks along 125 popular hiking trails in Hong Kong have been uploaded onto the Office of the Telecommunications Authority's website.

The digital maps show whether emergency telephone calls may be connected to at least one of the local mobile operators along the hiking trails.

The maps use three different colours along the trails to denote the availability of mobile-service coverage.

Green indicates the signal of at least one local mobile network is good. Yellow means the voice quality of calls may be poor, and red indicates a lack of network coverage. At locations marked with green or yellow, hikers subscribing to any GSM network may dial 112 to contact the 999 emergency centre.

Maps for reference only

The digital maps should be used as a reference only. Hikers must prepare before setting off, paying attention to weather reports and refering to more detailed hiking publications published by the Agriculture, Fisheries & Conservation Department. They should avoid hiking alone.