It operates like a standard color Palm OS device, but several hard (external) and software buttons launch the 'phone' application, which manages calls.

The phone shipped with a charging cradle with a DE-9 serial port, extra battery, and a case.

Installed applications included ones carried over from existing Palm handheld non-phone devices: Graffiti, Memo Pad, Date Book, Scheduler, Calculator, To Do List, Alarm/Clock, Address Book, Expense Manager, and Palm Desktop Software.

The phone was not compatible with Sprint's 3G network and its maximum connection speed of 14.4 kbit/s made browsing slow, but browsing "the real web" in 2001 was an advance on the WAP browsers on other mobile phones.

The SPH-i330 has a more rounded body and PC connectivity over USB rather than a serial port, but has the same screen, Palm OS version, and general feature set as the SPH-i300.