Iphone 3g

i want to change my iphone software and wants to upgrade it..

right now i am having iphone 3g 8gb with ( 2.1 ) how can i upgrade securely in 2.2 and whts advance feature in 2.2 ? can someone tell me please

Regards

Ali Shaikh

Use iTunes! http://www.apple.com/iphone/softwareupdate/

i just want to ask... if i do like this.. then my data will remain safe ? i make it unlock from pakistan... and it will lock again any chance ????

it l be lock be careful its has a dangerous method do not apply it require expert who has upgrade ebefore

^no phone software/firmware requires any expert to do that. it just requires one's fear able attempt but only first time. it doesn't harm if you follow the instructions.

@Ali3333

following is the link how apple describes it to you. they give you all the instructions and precautions to take before and during the upgrade process.

http://www.apple.com/iphone/softwareupdate/