And so, first you need:
1) F.O.S.S.E. You can download V2.5.1 by clicking the download button above 🙂
2) Android device
3) Installed Fallout Shelter on Android
To hack follow the steps below:
1) Connect the android device
2) Copy the save Vault1.sav and Vault1.sav.bkp from \ My Documents \ My Games \ Fallout Shelter to your phone in Android \ data \ com.bethsoft.falloutshelter \ files
Fallout Shelter: Save Editor [FOSSE 2.5.1] Free Download
3) Turn off the phone
4) Open F.O.S.S.E. open the save file and edit whatever you want and save
5) Connect the phone and copy Vault1.sav and Vault1.sav.bkp back to your computer in \ My Documents \ My Games \ Fallout Shelter with the replacement of files and rejoice 🙂
Thanks for attention!