im quite new to phones, so there are some things i dont know: -do i need to upgrade anything, how do i check it? -can i change the start up of the phone, or at least the music? -in polaris office, when i read a document but touch a certain point too long, it automatically wants to look up the word in dictionary. how do i disable this or just remove the dictionary? -how do i rename applications/folders and change their icons. also i noticed that applications in folders were somehow rearranged, all of a sudden. why is that? -what is the quickest way to exit an application? -how do i stop the music player? there is only a pause button, no stop button. -i want to try a new keyboard, or internet browser. can i still use the old ones if i try a new one? -if i delete some applications i dont need, like social hub or email, can i still get them back? -how do i make sure i use internet via wifi and not via the phone provider? its quite expensive.