Downgrade 3.1.3 to 3.0.1

[Davesdream]

Hi, since I upgraded my 2G to 3.1.3 it keeps waking up from sleep every 10 seconds, like if it is connecting and disconnecting a power supply. I already tried cleaning the connector but I see no change so I'm wondering if the problem is the version itself or maybe the IPSW file that I'm using. That's why I want to try a different approach and use 3.0.1 again (which I had no problem with for more than a year) My question is. How I downgrade a 2G 3.1.3 to 3.0.1 without running in any trouble. Can I just "Shift-Restore" I read a guide in MMI, but it didn't specified a 2G, but a 3G.
Please help with Comments/Advice/Tips..
Thank you.

[iYeow]

Download your firmware from here :iClarified - iPhone - Where To Download iPhone Firmware Files From
Put your iphone into DFU mode
Do the shift + Restore to 3.0.1 ipsw
Use kick out of recovery from the feature of Tiny Umbrealla
Jailbreak with Redsn0w 0.8 but point to 3.0 ipsw.
You are done.

[Davesdream]

Why I have to use Tiny Umbrella after restore? After restore and load the OS it suppose to go out of recovery by its own, right?

[iYeow]

Well if you didn't get 1015, then you don't need it.

[i.Annie]

Sometimes it gets error 1015 like Yeow said. It's a baseband downgrade error, which is supposed to happen since basebands can't get downgraded via iTunes. That's why it gets stuck in Recovery Mode which TU will kick it out of.

[Davesdream]

Oh, I see. Didn't know.
One last question. Why I have to put it in DFU mode. What I mean is. After you plug the phone ITune will give you the summary page where you can "shift+Restore" (I just want to make sure I really understand the why's of every single step)
Thanks again.

Oh, I understand know (http://www.ihackintosh.com/2009/06/r...-and-dfu-mode/)

[Davesdream]

...
Jailbreak with Redsn0w 0.8 but point to 3.0 ipsw...

Why 0.8?... There is 0.9. Is there any difference?

[i.Annie]

Each Redsn0w version is designed for different firmwares. Like for 3.0 you use 0.8, for 3.1.2 you'd use 0.9.3, for 4.1 you'd use 0.9.6b1 etc.

:/ I might have some of the numbers jumbled...but you get the point haha.

[Davesdream]

Gotcha...

[iYeow]

The higher the version , the most recent it is but the catch is different versions do different version of OS jailbreak.

[Davesdream]

What I want is to get rid of this annoying go to sleep > wake up > go to sleep > wake up every 10 seconds. I went to UBROKEIFIX store to ask if they know what is happening and they had no idea why this is happening.

[iYeow]

What wake up and go to sleep are you talking about ?

[Davesdream]

What wake up and go to sleep are you talking about ?

Read the fist post of this thread

[iYeow]

Dfu mode, Then just shift + restore to 3.0.1 or even 3.0, error 1015 pops up, kick out of recovery and jailbreak with redsn0w 0.8. It only takes 15 minutes to find out.

You may have a problem with your iphone, normally , it should not do that.

[Davesdream]

I'll try to go back to 3.0.1, but now I recall this thing started to happen one morning after I unplugged it after I left it charging overnight. And I had it at 3.0.1

[iYeow]

Yeah, if after going back to 3.0.1 , you still have this issue, time to get a new one, sell this for parts..

[Davesdream]

AMAZING... After downloading all the files and be ready to restore back. I opened ITunes, plugged my phone. Summary came up. Press the sleep/home buttons, the red slider showed up, but I keep pressing. Phone turned off. At this point i didn't know if it was in DFU, so I unplugged it and turned it on. After on just for curiosity I test to put it to sleep and see if it awakes by its own........... VOILA!!!!!........ Is fixed by itself!!!..... DON'T ASK ME... I'M STILL IN SHOCK... I don't know why now works... I've been dealing with this issue for the last 2 weeks... Let's see what happens if I put the SIM ...

***.............. AND IT WORKS !!!!!!!!!!............... ***

[iYeow]

Congratulation, must be your magic hands.