Originally Posted by JSanders
Perhaps you deleted it from the BB?
Did you try loading it from DM > App Loader?
Personally, I would recommend loading the latest officially released OS for the 8700, but you do whatever you think is best.
I have a 8310...not 8700. The latest O/S on AT&T site is 18.104.22.168. I know BB Forums has 4.5.xx. I went back into app loader and it showed that the attachment service was there.....also showed on phone...even though did not work anymore. So, I unistalled then re-installed the attachment service....no luck. So, I am now reloading the 22.214.171.124 O/S. If this does not work....I'll upgrade to 4.5 O/S.