Chuyển đổi đầu số - đầu số mới is a free iPhone application developed by DMOBISOFT SOFTWARE COMPANY LIMITED. This utility tool is designed to help users update their phone contacts from the old 11-digit format to the new 10-digit format, as mandated by the Ministry of Information and Communications in Vietnam.

The app offers several useful features to simplify the conversion process. It automatically displays all the phone numbers that need to be updated from 11 digits to 10 digits. Users can choose which numbers to update according to the new area code. The app supports all 11-digit numbers from the five major mobile network providers in Vietnam.

In addition, the app provides an automatic backup feature before the conversion, allowing users to restore their old 11-digit numbers if needed. The interface is simple and user-friendly, ensuring a quick and convenient experience for users. Moreover, the app prioritizes the safety and security of user data, ensuring absolute privacy.

With Chuyển đổi đầu số - đầu số mới, users can easily update their phone contacts to comply with the new numbering system, ensuring seamless communication in Vietnam.