How to change the bitrate of an mp3 file .....cant find a successfull software?

i want to convert my mp3s from 128 to 48 kbps so that i can put more songs in my cell as smaller bitrate takes less space



i know its quality will detoriate but then also



please suggest some softwares that actually work[i prefer freewares ..because sharewares alow only first 30 seconds of conversionHow to change the bitrate of an mp3 file .....cant find a successfull software?
Go for the free file converter SUPER, It can be downloaded from www.erightsoft.com. Its free and you can change the bitrate as you like.How to change the bitrate of an mp3 file .....cant find a successfull software?
oh...download d power mP3 wma converter...real kool..cn evn make thm smaler thn 32kbps...take it frm www.download.com..tz gUD!