MP3 & Connectivity
The phone has good all-round support for many versions of the MP3 file format, however support for WAV encoded files is not as extensive
AAC support is good, and the phone can only properly handle LC AAC. HE-AAC (a.k.a. AAC+, a.k.a. eAAC) will play since HE-AAC is designed to be backwards compatible, however the SBR component will be ignored. The same is true with HE-AAC v2 (a.k.a. eAAC+), only the normal LC component of the file will be played. The SBR and parametric stereo (introduced with HE-AAC v2) is ignored. Since HE-AAC v2 encodes the sound as a mono-aural track and the stereo separation is recreated through the PS data, HE-AAC v2 files played on a K750 actually play back in mono.
The phone can also be used as a modem via Bluetooth, Infrared or USB. According to the Sony Ericsson website, the K750 has a talk time battery life of 9 hours and a standby time battery life of 600 hours.
Read more about this topic: Sony Ericsson K750