[D-community-offtopic] is it possible to upgrade ios without loosing personal data

[Kamaraju S Kusumanchi]

Does anyone have experience in upgrading iOS? In particular, I want to 
upgrade my ipod touch from iOS 3.1.2 (7D11) to say 4.1. From what I read 
online, this would erase all the personal data. So, I would like to know how 
to backup / restore all the personal data, contacts, songs I copied manually 
etc.,. All the links from google searches do not answer this question. Is 
there any easy way or do I have to purchase some third party software to 
achieve this? If so, can you recommend a software that actually works?

thanks
-- 
Kamaraju S Kusumanchi
http://malayamaarutham.blogspot.com/