Hi guys,
I'm using a maxis iphone and plan to JB my phone tonight. If everything goes well, i will JB my gfs phone too as she's on a Celcom line but having problems with the prefix (maxis set also)

Instead of restoring in QuickPwn using the recommended ipsw (iPhone1,2_2.2.1_5H11_Restore.ipsw), is it possible for me create my own ipsw by backing up my personal settings? Following which using that as the file for restoration in replacement of the suggested file?

If yes, how do i make this backup? Thanks for reading!