iPhone to iTunes application transfer Usually people used to download application on iTunes &amp; then install it on their iPhone using iTuens sync. 
Currently, I have an iPhone that I bought from my friend. 
He had purchased many applications on iPhone. 
When I connected the phone to my iTunes, it asked to transfer or don't transfer. When I choose, transfer - It transfered all the items. 
Even though it was not from same account of itunes.
I have different iTunes account &amp; purchased application was from different itunes account even though it could transfer - my question is why - iTunes allows doing this ? 


Ok. One more problem that I faced is as follows.


When I was in wifi range, I directly downloaded an application ( using same account which I have on my itunes ).
Next when I connected iPhone to iTunes, it didn't transferred anything &amp; I lost my downloaded application.


Did any-one faced this issue ? If yes,
What did you do to resolve this issue ?

Thanks in Advance for sharing your great Knowledge.
Sugar.
1)your friends itunes account was probably registered on your phone when you synced with the computer.

2) you can only be synced with one itunes account at a time. your problem might be that your synced with your friends account so any app that you download with your account wont be able to sync any apps unless you change it to sync with your account(which will delete all apps not purchased with your account.)