 How to call:
010 - Exit code when making an international call from Japan
84 - Vietnamese country code for inbound calls
4 - Hanoi city code
010 + 84 + 4 + Local Number - International dialing code format
 World Times:
The time in Japan is now 20:46:12 PM (08:46:12 PM)
The time in Hanoi Vietnam is now 18:46:12 PM (06:46:12 PM)
 Mobile codes:
To call a mobile phone in Vietnam from Japan use the following dialing code format: 010 + 84 + 9# + The Number
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