You can't opt into the Insider Ring because it's gone for W10M. The latest version of W10M for the 830 is the "Anniversary update"
Windows 10 Mobile - January 2018 status for all compatible phones
Long time no see, Drael. I wondered about you and what you would say after MS told us "officially" that W10M is dead. You were always so optimistic about the future of it, although me and everyone else here told you otherwise.
FYI: With the newly released WPInternals I successfully unlocked the bootloader on my 950. I switched the hosts file and now I have adblocking working :cool: