1. Can I make a complete copy of the first version of the system? Mi Jolla has a very old Sailfish and I do not want to lose it when I update the phone.
2. If I restore the factory settings of the phone, will I have the first version of the system even if I have updated the phone to the latest version?
3. Are there unofficial versions of Sailfish for Jolla 1? I'm interested in ROMs, modifications, etc. I've been on Android for many years.
4. What modifications can be made to the system? Root, bootloader, etc.
5. What are the programs available to modify or update the mobile from the computer?