How to call China Unicom customer service overseas?

Hello, if you need to consult or make a complaint when using international roaming service and Hong Kong, Macao and Taiwan roaming service overseas, you can call China Unicom’s international roaming and Hong Kong, Macao and Taiwan roaming customer service hotline (the mobile phone dialing method is: (8618618610010) or (international access code) 8618618610010). This hotline provides 7×24 free services to outbound roaming users (free only when users use China Unicom mobile phone numbers). Users can also dial the customer service hotline 10010 in the user's home location to obtain China Unicom's 24/7 service. However, calls to the 10010 customer service hotline in the user's home location will be charged for international roaming and Hong Kong, Macao and Taiwan roaming calls.