Differentiating features include:
Built-in 3D accelerometer: allows phone to act as pedometer/step counter.
Swap key for quick one-key switching between phone, music, and sports modes.
Stainless steel body: Built to resist knocks, dust and water splashes.
Text to speech: Software to read aloud SMS and exercise data.
Sports tracking: plans, records, and schedules workout sessions.
Music: Unique tap commands for playing MP3 files.
Integrated 2-megapixel camera with 4x digital zoom.
Weight 103 grams (including battery)
Dimensions 107 mm x 45 mm x 18 mm (L x W x T)
Standby time 270 hours (Up to 10 days)
Operating System Symbian OS (9.1) + Series 60 v3
GSM frequencies GSM 900/1800/1900 MHz
GPRS Yes, GPRS multislot class 10, up to 62.4 kbit/s
EDGE (EGPRS) Yes, EDGE multislot class 10, up to 236.8 kbit/s
Screen Size 31 x 31 mm / 3.1 x 3.1 cm
Screen Resolution 208 x 208 pixels
Camera 2.0 megapixel, 4x digital zoom (1600 x 1200, 1152 x 864, 640 x 480 pixels)
Video recording Yes, QCIF (176 x 144 pixels), sub-QCIF (128 x 96 pixels)
Text to Speech Yes, SMS and exercise data read out loud
Push to talk Yes (Push to Talk over Cellular - PoC)
Memory card slot Yes, microSD (Expandable up to 2 GB)
Hot Swappable Memory card slot No
Bluetooth Yes, Bluetooth 2.0 + EDR (Enhanced Data Rate)
USB Mass Storage class support Yes, via Pop-Port
Browser WAP 2.0 XHTML / HTML. Comes standard with a full Web browser
Music player Yes, stereo, MP3, AAC, AAC, eAAC and WMA playback support
Radio Yes, FM Stereo with Visual Radio client
Ringtones Yes, Monophonic, Polyphonic, True Tones and MP3