For the G610F U1 variant, this firmware runs on Android 7.0 Nougat. It is often pre-rooted, supports both SIM cards, and its purpose is purely for device restoration and testing, not as a long-term daily driver.
The flashing process is the same for both standard and auto-patch firmware: it's done on a Windows PC using Samsung's official . g610f u1 auto patch file
If the patch succeeds but you still have no signal, verify your IMEI status by dialing *#06# . If the IMEI is shown as "Unknown" or "000000", your EFS partition is severely damaged. You will need to write a new NV data file or use a professional service box (like Z3X or Octopus Box) to repair the physical certificate before reapplying the patch. For the G610F U1 variant, this firmware runs on Android 7