iPhone 3G 4.1 6.15 Downgrade to 3.1.3?

[zakiyyboss]

I have upgrade iphone 3g to 4.1 for having the basband 6.15 so that to use Ultrasn0w. Now i want to know if i will be able to downgrade to 3.1.3 with baseband 6.15 and used ultrasn0w?

[GSMAAS]

yes used it no problem

[Oxegen]

why u want to downgrade?
u can now unlock all new version

[zakiyyboss]

Originally Posted by Oxegen

why u want to downgrade?
u can now unlock all new version

Because of cycorder RUNS on 3.1.3 only and it is more smooth !

But according to redsn0w warning it says when u upgrade to ipad baseband you wont be able to use stock ipsw !!

[asarmen]

no roblem 1000000% tested.
1. restore 3.1.3
2.jailbreak with Spirit or redsn0w-win_0.9.4(Browse file iPhone1,2_3.1.2_7D11_Restore )
3.unlock with new ultrasn0w(wi-fi metod).

................Enjoy 3G ...................

[newfoundghori]

hi as dev team says!!!

WARNING — YOU DO THIS AT YOUR OWN RISK! PLEASE UNDERSTAND THE CONSEQUENCES OF UPDATING TO 06.15.
1.There is no way to come back down from 06.15, and there’s no hiding the baseband version from Apple. You’ll be voiding your warranty in a very obvious way.
2.If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).
3.Starting with FW 4.2.1 if you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail). You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that).
Certainly don’t update to 06.15 if you don’t need to! Only do this if you need the unlock and you’re stuck on 05.14 or 05.15, and you’re willing to assume the above risks.