Backup iPhone apps

[ADRENALIN_2099]

I bought an iPhone 3GS 32GB and the thing has around 20 apps that i would like to save, since im not the original owner i want to know if there is a way to save the apps so that i can sync it with my itunes and also add my apps to the phone.

thank you for the help.

the phone is running version 4.1 and is not jailbroken

 

[ADRENALIN_2099]

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