Files can be sent to the mobile phone by direct connection (e.g., USB cable), Bluetooth, Def Leppard ringtones, or e-mail, however, most ring tone makers have adopted a "one size fits all" strategy of downloading through the Internet; while appealing to the lowest common denominator, this method usually results in charges to the user for Internet time used on their mobile phones.While including PDA applications (address book, calendar, to-do lists, etc.) as well as Faith No More ringtones capabilities on newer models, the BlackBerry is primarily known for its ability to send and receive e-mail wherever it can access a wireless network of certain cellular phone carriers.