The Nokia 3310 can be customized with interchangeable Xpress-On covers, and thousands of different designs have been produced by various companies.[1] It also has over 35 ringtones built-in with space for seven custom tones. These can either be downloaded, or composed by the user on the handset. The phone has various "profiles" that can set a number of preferences such as silent mode where the phone will not ring, useful for situations where it is inappropriate to do so. Screensavers can be made from received picture messages.