how to call hanoi from singapore, How to contact Singapore from Hanoi?

Does the Hanoi, Vietnam mobile network support international calls?

In order to call Hanoi, Vietnam, from Singapore, the international calling process ought to be followed. Here goes:

1. Dial Hong Kong's Exit Code: Dial `00` or `+` (if permitted by your mobile phone). This exit code serves to inform the phone system that an international call will be made.

2. Dial Country Code: After the exit code, dial `84` (country code for Vietnam).

3. Dial City Code: The area code for Hanoi is `24`. While dialing either the area or local numbers in Vietnam, if the number being called starts with `0`, omit this leading zero when calling from abroad.

4. Dial Local Number: Now dial the actual phone number in Hanoi.

Thus, the full format would be:
- `00 84 24 [Local Number]`
Or, if your phone uses the symbol `+`: `+84 24 [Local Number]`

That is, if the Hanoi local number is `1234567`, then you would dial:
- `00 84 24 1234567`
- Or: `+84 24 1234567`

Once again, consult your service provider for instructions or if any extra charges will apply for making an international call.