3 way Calling:

Ability to converse between the cell phone user and two other parties.

Bluetooth:

Wireless connection that has the ability to send and receive data with other Bluetooth enabled devices such as wireless headsets, car audio, cell phones, printers, fax machines, keyboards, and mice. 

Call Hold:

The ability to place a call on hold without losing the connection. 

Call Timer:

The cell phone tracks and displays the length of time a call has been active. 

Call Waiting:

This standard feature works similarly to your land line call waiting feature. You'll hear a specific tone when you are on your cell phone and another call comes in. Hit the button to put your caller on hold while you speak with the second caller. Alternately, you can ignore the call and the caller will be sent to your voicemail.

Caller ID:

The cell phone displays the name or number of the person calling.

Depth:

The thickness of the phone measured front to back in centimeters.

Digital Camera Resolution:

The resolution or clarity of pictures taken using the built-in digital camera. 

Digital Player:

The cell phone supports digital media like MP3s.

Display Resolution:

The clarity and quality of the display screen.

GPS:

The phone includes the ability to also be used as a GPS.

Height:

The length of the phone from top to bottom.

Internet Browser:

The phone supports Internet search capabilities through an Internet browser usually a form of Internet Explorer. Other browsers include Safari and Opera. 

Memory:

The size and type of memory the phone uses to store information like documents, photos, digital media and more. Some have built-in memory whereas; others rely on external media like SD cards. 

Operating System:

The cell phone includes an operating system for email, Internet, documents and games. Popular operating systems include Windows Mobile, Symbian and Palm OS. 

Phone Style:

Cell phones come in all shapes and sizes. Some popular phone styles include the flip phone, candy bar and slider. Most business phones are considered candy bar or slider phones. 

Phonebook Capacity:

The maximum number of contacts the phone can store in the address book.

Polyphonic Ringer:

The cell phone supports polyphonic ringtones.

Screen Size:

The size of the display screen measured in inched diagonally. 

Standby Time:

When a phone is powered on, but is not in use – in most cases dimming the display or turning the display off completely.

Vibrating Alert:

The phone has a ring function that makes the phone vibrate to alert the user of a call. 

Video Recorder:

The phone has the ability to record a short amount of video usually using the digital camera lens. 

Warranty:

The amount of time the manufacture guarantees the phone will work without defect. 

Weight:

The weight of the phone measured in ounces.

Width:

The length of the phone measured from left to right in centimeters.

Battery Life:

The amount of time a battery will hold a charge before needing to be recharged.

3G:

3rd generation mobile phone technology allows the phone to utilize advanced features such as high speed internet, and video calls.

Email:

The phone's ability to send and receive emails.