content: An OS update comes from Google and goes to Samsung, Samsung then makes sure it works on the phone and that all of the Samsung apps work with it, then they pass it to ATT who makes sure their apps work on it then pass it to you. Somewhere in there someone finds something that doesn't work and either has to update it or just halts the process, guess what happens most of the time? I said samsung and att but replace with maker and carrier of your choice.