Cydia is a jailbreak application downloader for the Apple iPhone and is designed to provide users with applications that are not readily accessible via the Apple iStore. While Apple itself does not sponsor Cydia, many iPhone users look at Cydia applications before venturing to the Apple iStore.

Yahoo Calendar is a feature that Yahoo provides that allows users to keep track of important dates and events. Yahoo Calendar is also interactive enough to allow users to insert notes for specific dates in order to label what is important about that day as well as share calendar dates with other Yahoo users.

Yahoo Mail is a browser-based email client that Yahoo sponsors, which allows users to access their email, compose new messages, and organize messages into various categories such as “Inbox,” “Trash,” and “Spam.” Likewise, Yahoo Mail users are able to label messages, depending on who they are from and their content.

An iPhone is a smart phone that Apple created that bundles the components of a cell phone, computer, PDA, and MP3 player. An iPhone is capable of accessing the Internet, communicating with nearby wireless devices via Bluetooth, and synchronizing itself with other Apple products.

The iPhone is one of the most widely purchased smart devices on the market. In the event that the iPhone is going to be sold, given away, traded in, or needs to revert to the original configuration, it may have to be restored to factory settings.

A SIM (Subscriber Identity Module) card is a storage device for cell phones and some other types of mobile devices that allows the user to transfer essential information such as contact information, account information, and sometimes pictures, from one device to another.

Unfortunately, the iPhone does not yet permit printing via Blue Tooth connection. There is another option for mobile users who desire to print text messages from the iPhone, since the iPhone supports screen capture, which can be emailed to an account that the text message can be printed from.

The iPhone, which Apple created, is a media device that combines the functionality of a phone, computer, camera, and media player. It features touchscreen technology that allows users to browse the Internet, select files, and run applications by simply touching the screen.

The Apple iPhone is one of the most purchased smart phones on the market. It gives the user the ability to send and receive email, surf the Internet, video chat, and send and receive SMS and MMS text messages.

Although the iPhone is designed to go into sleep mode after a pre-defined period of inactivity, it still loses power in this state.