I am using the 5.7.893 update and am not rooted. My question is how would I get back to .886 to get the official OTA when it comes out?
Released will get you back to system version .866, however if you upgraded yourself to 5.7.893 then you cannot go back to the old kernal / radio files of .866, just the system. I'm not sure that the OTA would install if it detects you already have upgraded your kernal and radio. Someone else maybe can answer that.
EDIT: lol sorry here's link for Released http://rootzwiki.com/topic/5484-r3l3as3droot-and-43v3r-root-for-the-bionic-v21/