Do you recomend any?Run a quick search and you will find tons of freewares as well as sharewares for that. Simply type "wav to mp3 converters freewares" in any search engine.
For my phone....Your music will loose some quality if you convert wma to mp3 because your recompressing an already compressed audio file .
So, it is better to convert the original source to mp3
But by the way, why you want to convert wma to mp3 ?? because as I know most (if not all) mp3 players now can play wma