I restored iPhone aka formatted it
I went to the store.The lady said you don't have any songs(as i had formatted) and we have to test it first.
I told her i had spoken to the customer care(which i had) and they told me to replace.
I also told her that it is a problem with indian iPhone,and i am jst replacing it cause customer care told me to check otherwise i would be returning it or suing Apple if they didn't return.
She took it,told me it would come in 5 days.But it came next day only.I went and picked it up
It didn't come in a box but it came with up and down plastic seal as it is when you buy it new inside the box.It is perfectly new as far as external with a new serial number
Also do it early as Apple might update firmware,you won't be able to jailbreak it.