Hi, I'm new here so forgive me if I don't include everything I'm supposed to or if I post incorrectly, I'll get better. I did check all 3 pgs for something to help with my situation b4 posting this question. Until Dec 2012 i'm using Android 1.5 (really old, i know) however, i found this site (slideme dot org) and would love to use it now on my phone(motorola backflip MB300). But (there usually is one :), I d/l the apk(com .slideme .sam .manager- 4.5.apk 2.81 MB), my phone will not let me install it. I get stopped cold by a "Security Warning" as follows: This application comes from an unknown source, and for your security only applications from trusted sources can be installed.Is there some kind of 'techno-junk' that i have to go through to get this installed? or would it jst be easier to download each app i want from the individual app description pages? Any help would be appreciated.