I switched from the iPhone to my great Samsun Galaxy s2. I realized a major difference between the iPhone and the Android system immediately--ads. I received NO ads on my iPhone. On the Android system you get ads, and apps that seem to want to 'watch' you on your phone, wanting access to your phone records/contacts, and other questionable items. I also have started to receive more crap emails, after supplying email address to these apps. I do not have as 'safe' a feeling with the Android operating system, as I did with the iPhone. I do not feel that my personal privacy is protected as well. This already has be leaning to go back to the iPhone, after my two-year contract is done.