Data transfer from 89C52 to Any PDA mobile using data cable

hi,
i have used the micro controller 89C52 for sending data into PDA mobile.
i searched lot for RS-232 to USB converter so i can send my data thro' USB cable but i cant find any thing reliable so if any of u used this converter than please forward me the site link.

I have checked tht my data received on hyperterminal of computer so i really need a urgent help to complete my project. 😀