A1 (Hong Kong OFTA Licence: 1559) as a Hong Kong native carrier operator in Hong Kong, mainland China and North America, Southeast Asia, Africa... A1 also has strong telecommunication networks and business system distributed in all our major oversea markets.
　A1 apply the U-SYSNGN solution in the world to form softswitch system to operator A-Z communication service networks. In North America, Hong Kong and mainland China are arranged three softswitch systems, with IP network connection, using the industry's advance communication protocol H323 and SIP, We are now providing worldwide Voip and standard international voice service for more than hundred countries and regions.

　 A1 has direct bilateral connections with most major carriers of the world. Currently, we have over 100 bilateral direct links with various carriers worldwide. To further expand our network connection and improve voice quality, A1 is always actively seeking new bilateral partners.
　A1 has a professional, reactive and experienced operation team to support our valued customers in 7x24 bases.