See there are the official suites which are launched by the respective companies and only support their handsets.
But there are some free lance companies which develop softwares which support most of the handsets.
For eg :
Nokia 6030 is not supported by nokia pc suite. They dont have a data cable for it nor do they have a software to support it. But we can find data cables in the market which are compatible with the set. So we can use softwares which support this handset(obviously a free lance software).
Mob time cell phone manager is one which i found most easy to use and supports a lot of handsets.......
have a nice time