I have a Lumia 1320 running on 8.1 update. I enrolled for insider and got the update for 10586.29 appearing on my phone. How do I get rid of it. I m not sure I want to update to 10 at the moment.
Un-enroll from the insider program and restart your phone.
You should have not enrolled if you're not sure you want to update to windows 10 mobile. Nonetheless, Windows 10 Mobile build 10586.29 is pretty stable, but don't take my word for it.