Updating to 3.1.2 before Unlocking?

[swat16]

I currently have a 3GS with 3.1 and 05.11.07. I jailbroke with blackra1n and then unlocked with blacksn0w. I need the unlock because I am getting rid of AT&T for T-Mobile tomorrow. Does anyone know for sure if I update to 3.1.2 TODAY will I still be able to unlock? Someone on this board mentioned that updating to 3.1.2 now will change my baseband and prevent the unlock. Any mods know the true answer? Is there any real reason to update to 3.1.2?

My second question is if I go to iTunes and restore, will it simply restore to 3.1? Does this erase all my data on my phone?

[gyromanx55]

if you update to 3.1.2, you can jailbreak with blackra1n. blackra1n will also unlock your iphone.

[i.Annie]

iTunes will back up your data such as contacts photos music videos and applications. Any jailbroken data can be backed up with aptbackup (free) or pkgbackup (paid--$3.49) from Cydia. Also for future reference, baseband is what determines unlockability (not firmware version) so upgrading to 3.1.2 won't hurt you. If you hit "restore" you will still be on 3.1, if you hit upgrade you will, duh, upgrade The 3.1.2 baseband is 5.11.07 so you have no worries.

[haissk]

make sure you take the latest blackra1n RC3 for unlocking your iPhone

[GIRLLLLLLLLLLLLLLLLL]

I think pkgbackup or Rock is a better way. aptbackup was worthless for me.

[i.Annie]

Pkgbackup is supposed to be better. I just used aptbackup tho cuz I didn't download pkgbackup an didn't feel like it. It worked well. One click restore and it's all back to normal but that's just me a lot of people ran into issues (I did a year ago it bugged out) but that was so last year lol

[Smithy365]

You're already on the latest BB swat, so updating to 3.1.2 won't affect it.

You'll still be able to JB/unlock using Blackra1n/Blacksn0w (respectively) just as effectively as you already have on 3.1.

Restore WILL erase all your data, so make sure you back up contacts, photos etc.

I don't bother with any Cydia backup apps. It only takes a min to reinstall everything anyway!

[i.Annie]

Actually it's a lot faster to use cydia backup apps cuz it only takes 1 click to put everything back in place. Beats searching for it all individually especially if you have a lot of little tweaks and stuff like openssh and sbsettings etc.

[pbateman420]

or use rock.. its far superior to cydia in every way (imo).. and a simple sign-up allows you to backup all apps..