would take such a long time to turn a simple music-playing phone into a proper portable audio player and brand it a

Walkman phone.
The Sony Ericsson W550i Walkman phone is a tri-band GSM/GPRS handset. It's a non-Smartphone, it doesn't run

SymbianOS or Windows Mobile or anything.
The W550i in Music mode lets you play back the music without having to worry about people calling or messaging you.
The phone does offer a 5-band equalizer that does a fair job of tweaking the sound.
The phone also offers a stereo widening option for that "3D surround sound" effect we've all come to hate after

seeing too much of it in all music devices.
If u want more details of this phone just click here