The P1i was the first new smartphone Sony Ericsson announced after its acquisition of UIQ Technology in February 2007. UIQ was the user interface platform the company had used for many years in conjunction with the Symbian operating system.
It was a 3G WCDMA device with Wi-Fi support and a 3.2MP camera. It used the latest UIQ 3.0 software.
The P1i combined design elements of the M600
and the P990
using the same dual function, QWERTY keyboard technology as the M600.
Software problems with the P990 and M600 had done damage to the P series brand and Sony Ericsson hoped the P1i would help address this. Unfortunately, the device was not a commercial success and did little to revive the UIQ platform.
The unit owned by the Mobile Phone Museum is labelled SE123 denoting that it is a rare prototype unit. Sony used the model name SE123 for all of its prototype units.