how to upgrade to 3.x but not 4.x?

[volkl1]

i've got an iphone 3g running 3.0 that i want to jailbreak. should i upgrade to 3.1.3 before jailbreaking? should i upgrade to 4.x? can i jailbreak from the most recent iphone 4.1 version? are there functional advantages to having the newer versions?

how do i upgrade and install to another "newer" version without going to 4.1?

thanks in advance.

[iYeow]

Is your iphone currently jailbroken at 3.0

Do you need an unlock

[volkl1]

it has not been jailbroken.

[iYeow]

For 3g, 3.1.3 is the fastest, 4.1 is abit slow . So which one do you want ?

[volkl1]

sounds like 3.1.3 is the best choice? which would you use? i will also need to unlock.

[iYeow]

Many 3g users have upgraded to 4.1 and then downgrade back. So go for 3.1.3 for now.
Download the 3g 3.1.3 ipsw from here : iClarified - iPhone - Where To Download iPhone Firmware Files From
onto your desktop
Now press the shift key + restore/update , a box will open up and browse to the 3.1.3 ipsw
Once restored and activated
You can jailbreak with Redsn0w 0.9.4 but browse to 3.1.2 ipsw.
Unlock with Ultrasn0w from Cydia.

[volkl1]

thanks. i have downloaded 3.1.3. do i connect iphone to itunes and then go to restore - shift +restore?

[iYeow]

Yes

I don't think you will get error 1015, but if you do , use Exit recovery from the feature of tiny umbrella.
When you open up Cydia for the first time, Say Yes to make my life easier, then all future shsh blogs will be saved.

[volkl1]

if i need to browse to 3.1.2 , does that mean i need to download that as well and keep on desktop?

was this post meant for me? am i using tiny umbrella?

[iYeow]

Yes , you need to download 3.1.2 as well

All my posts are meant for you.
Since you have restored to 3.1.3 successfully, you do not need Exit recovery.

[volkl1]

when trying to restore w/shift key, it appears i've gotten the standard restore. i never got a box giving me a choice of software. so now i'm locked out w/ no att sim card. i'm at the emergency call screen. ????

[iYeow]

Why ? you press the shift key first and then press the restore button.
If you hit restore, you will be taken to 4.1 which locks you out.

[volkl1]

i pressed the shift key then restore and it upgraded to 4.1.

since then i jailbroke w/ redsnow 0.9.6b1- seemed to work
then unlocked w/ cydia- seemed to work
now the phone operates on a 20 sec delay, keeps searching for network and shutting itself on and off

any suggestions?

[iYeow]

Comfirm your baseband first, if it is 05.14.xx, then Ultrasn0w will not work yet, wait for an updated version or a new unlock tool.

[volkl1]

after trying limera1n and others, i'm now back to an itunes restored 4.1 (05.14.02).

what can i do to jailbreak and unlock this?

can i still go back to 3.1.3? every time i held the shift key when hitting restore and nothing happened but apple restore. what am i doing wrong?

[iYeow]

You don't press shift and restore the same time. You press shift key first and then the restore button, it should pop a box.
Do you have fingerprints scanner installed on your laptop ?
Yes you can downgrade your firmware to 3.1.3 by simply putting your iphone into DFU and do the Shift + Restore to 3.1.3 ipsw.
But you cannot unlock your iphone since the baseband has been updated.