With an operation to update the contacts on the new head !!!!
- The application allows quick transfer of the first fixed number old to head the new fixed of 63 provinces, as well as convert the first mobile number 5 carrier MOBIFONE, Viettel, VINAPHONE, Vietnammobile, Gmobile from 11 - > 10 number.
- The application also allows moving backwards from the start of the first new old number of fixed and mobile
- The application allows quick transfer of the first fixed number old to head the new fixed of 63 provinces, as well as convert the first mobile number 5 carrier MOBIFONE, Viettel, VINAPHONE, Vietnammobile, Gmobile from 11 - > 10 number.
- The application also allows moving backwards from the start of the first new old number of fixed and mobile
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