Am on one ui Beta 1 do i need to pass by the beta 2,3 and 4 to get to the stable vers

[jnnnk]

if not how to know wchih frimeware to download for my region my service provider sw ver is : XFF/XFE/XEH and i live in algeria

 

[winol]

Yes, you can flash any firmware with equal or higher bootloader version, in sammobile you can find the correct country/carrier for you