Use APKPure App
Get 8 to +7 old version APK for Android
전화 번호부에 + 7XXXYYYYYYY에 8XXXYYYYYYY에서이 프로그램 변경 전화
This program change phone from 8XXXYYYYYYY to +7XXXYYYYYYY in your phone book.(i.e. change phone 89161234567 to phone +79161234567).
There are 2 modes:
1) manual - confirm each change
2) auto - change all phones like 8XXXYYYYYYY to +7XXXYYYYYYY.