The Sony Ericsson P800 (2002) and P900 (2003) were groundbreaking, high-end Symbian smartphones that served as early foundations for modern mobile computing. Operating on the UIQ touch-screen platform, these personal digital assistant (PDA)-style devices dual-headlined the golden era of executive mobile tech by mixing stylus-driven touch input with physical keyboards. The Shared Dual-Identity Form Factor
The defining characteristic of both smartphones was their modular hybrid design:
Closed Flip Mode: With the keypad flip closed, the phone blocked out a lower portion of the screen, operating like a traditional “candy bar” feature phone with physical keys.
Open PDA Mode: Flipping the keypad down (or completely detaching it with a tool) exposed the full large touchscreen, transforming the device into a comprehensive stylus-driven PDA. Sony Ericsson P800 (Released late 2002)
Codenamed “Linnea” and built on core designs engineered by Ericsson before the Sony joint venture, the Sony Ericsson P800 was a pioneer of its day:
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