The P535 runs on the GSM network and supports GSM900/1800/1900, and on the data side supports GPRS class 10. Windows Mobile 5 acts as the operating system with Windows Media Player 10 providing media playback functionality. Bundled with the mobile is a suite of office and lifestyle applications aimed to satisfy the needs of business executives. View and edit office documents, handle e-mail through a push pipeline, and display powerpoint presentations through the Bluetooth interface.

WiFi access is done through the B/G wireless adapter. The phone comes bundled with Skype, so if you have wireless access then phone calls can be made using Skype. A fully functional GPS receiver is also included with corresponding map data. Finally, there is a 2 megapixel camera with autofocus and flash. The camera can also act as a business card reader that automatically parses the contact information and stores it inside of your address book. Data is stored on the 256 MB of included flash memory, or on an SD card.