I have been travel by business trip to Vietnam so many times and during the business trip I am just using prepaid sim card.
Since, I am going to move to station in HCMC soon. I am thinking to change to postpaid service.
1. How to apply to postpaid service with mobile phone operators (Vinaphone/Mobifone)?
2. Is it any promotion for International call in postpaid service? Is it cheaper comparing to using prepaid? (if it is same cost, so I will just using prepaid)
Thank you.