Basic english talk on phone for jobs and oral english improvement?

Hi,I am good at writing in english but get tensed while speaking on

telephone,generally I get stuck and unable to respond properly.

Say for eg if they ask when can you join our company,I simply say whenever they wish whereas I would like to know from them details regarding when actually a position for such is required and explaining my present job responsibilties which i have to get relieved.But for ease sake I just come up with that answer.
My main problem is enlish speaking phobia on telephone,I just cant
respond properly.What should I do?

It was my problem too. i tried many ways but the easiest way was watching English movies with english translation. So u can hear & read conversation in the same time. you will know how to spell correctly. without getting board from learning..

you can find movies tarnslations on ( www.divxsubtitles.net)
& make them work by DIVX program

good luck

Be daring - speak whenever you get the chance and practise always makes perfect. Tell your friends to correct you on the spot and don't be embarased if because if you don't make mistakes, you won't get the chance to learn.

I guess you cannot distinguish what is written English either formal or informal as against conversational English. Aware of this, you will know what to say and enjoy telephone conversation.