我想在 Jailbreak 和 Unlock 之前 BACK UP 所有的 files， 可以嗎？
請指教

Please advise, I'm going to update my phone, but I got many applications download from Cydia. Please help!

use "aptbackup"
download in cydia
use the backup function inside
then use itunes to backup ur phone
update ur phone, then restore backup using itunes
after u jailbreak, install aptbackup again, press restore backup.
it will run cydia to download all the cydia apps

Thanks very much indeed!