2 friends broght me their iphones 3g when 2.1 jailbreak became available.

I restored BOTH to 2.1, and quickpwned them.

time passed.

2.2 became available, and since they are on official contracts, theu UPDATED.

i thought that that would remove the jailbreak, cydia, etc.

and that happened to one of their phones.

but they say (i couldnt check it), that the other one is still jailbroken, but UPDATED.

is it posible ?

pd: both of them had "manually installed appstore apps" (or so they say), and both kept them, but the iphone that lost cydia, cant use them (logically)