iPhone keep shutting down after jailbreak

[zyrl]

I jailbreak my iPhone 3GS 3.1.3 using Spirit

Den i proceed to install untrasn0w to unlock it

now my iPhone randomly shutdown while i was using it. Sometimes it shutdown when i wanted to send an sms, sometimes when i was taking photos.

What could be the problem?

Apps installed:
ultrasn0w (shutdown occur after app was installed)

Five Row Dock (shutdown occur before app was installed)
SBSettings (shutdown occur before app was installed)
Categories (shutdown occur before app was installed)

[iYeow]

Looks like the jailbreak didn't go smoothly.
Restore to 3.1.3 again and jailbreak it with Spirit or Jailbreakme 2.0 from Safari on your iphone ( Slide to Jailbreak )

[Orby]

When you say "shut down" you mean a forced reboot back to the Apple logo, or something else?

What SHSH blobs do you have saved with this iPhone?

If you don't know, you can see what you have at the top of Cydia (like so: Twitpic - Share photos on Twitter) or use TinyUmbrella on your to double-check...

[zyrl]

Looks like the jailbreak didn't go smoothly.
Restore to 3.1.3 again and jailbreak it with Spirit or Jailbreakme 2.0 from Safari on your iphone ( Slide to Jailbreak )

Dear iYeow,

Is it a known problem in Jailbreaking issues? For iPhones to shutdown itself after jailbreak?

Off topic: is Spirit better or redsn0w better to unlock

When you say "shut down" you mean a forced reboot back to the Apple logo, or something else?

What SHSH blobs do you have saved with this iPhone?

If you don't know, you can see what you have at the top of Cydia (like so: Twitpic - Share photos on Twitter) or use TinyUmbrella on your to double-check...

Dear orbyorb,

Shutdown as in the whole iPhone went black... i need to hold down the power button in order to switch on it again... den it shows de apple logo... sometimes it managed to start normally (slide to unlock)... but most of the time, it just went black again... i will need to connect it to a power source and charged it to get it working again.

FYI, the batter is still around 50% most of the time it happens

[iYeow]

Spirit is a good jailbreak tool, never have this problem. Redsn0w doesn't unlock, it is also a jailbreak tool. To unlock , you jailbreak your iphone and then you install Ultrasn0w from Cydia to unlock.
What you can do now is restore to 3.1.3 again if you have 3.1.3 shsh blob for 3gs. Then test it out without jailbreak to see if it shuts down by itself. If it does, then it could be a hardware problem.
If it doesn't , then do your jailbreak again and see if it resolves your issue.

Oops, just saw that you only have 4.2.1 blob, so you cannot do any restore to 3.1.3 except to 4.2.1.
Do you know what bootrom you have , you can check it out from here :
iClarified - iPhone - How to Check the Bootrom Version of Your iPhone (Windows)
If you have the oldbootrom, then the only way to preserve your baseband is to restore to custom firmware of 4.2.1, it will be a tethered jailbreak if you have the new bootrom

[Orby]

No SHSH blobs for anything other than 4.2.1... this might get ugly.

Zyrl, what are the third, fourth, and fifth characters of your serial number? (e.g., 937)? This will help us determine if going to iOS 4.2.1 on a restore and then jailbreaking/unlocking from there will be tethered (not preferable) or untethered (preferable).

[zyrl]

Spirit is a good jailbreak tool, never have this problem. Redsn0w doesn't unlock, it is also a jailbreak tool. To unlock , you jailbreak your iphone and then you install Ultrasn0w from Cydia to unlock.
What you can do now is restore to 3.1.3 again if you have 3.1.3 shsh blob for 3gs. Then test it out without jailbreak to see if it shuts down by itself. If it does, then it could be a hardware problem.
If it doesn't , then do your jailbreak again and see if it resolves your issue.

Oops, just saw that you only have 4.2.1 blob, so you cannot do any restore to 3.1.3 except to 4.2.1.
Do you know what bootrom you have , you can check it out from here :
iClarified - iPhone - How to Check the Bootrom Version of Your iPhone (Windows)
If you have the oldbootrom, then the only way to preserve your baseband is to restore to custom firmware of 4.2.1, it will be a tethered jailbreak if you have the new bootrom

Oh, does dat mean i cannot restore it to 3.1.3?

I will need to use IOS 4.2.1 if i restore?

When i saved my SHSH, i was on 3.1.3 den i clicked the "Save SHSH".

[Orby]

Oh, does dat mean i cannot restore it to 3.1.3?

I will need to use IOS 4.2.1 if i restore?

When i saved my SHSH, i was on 3.1.3 den i clicked the "Save SHSH".

Unfortunately, it seems that Cydia only has your 4.2.1 (i.e., the most recent and only ones available today) SHSH blobs. If you clicked "Make my life easier, thanks!" or saved your SHSH via TinyUmbrella before June 20th of last year, only having 4.2.1 blobs is very strange and somebody oughta talk to Saurik (maintainer of Cydia) about that. However, if this is the first time you've done either of those things, then that is correct. Firmware version installed on your device has nothing to do with what SHSH blobs you can save, and therefore, what versions of iOS you can restore to.

To more directly answer your question, yes, it means 4.2.1 is your only option for a restore currently.

[zyrl]

Can i remove the Spirit jailbreak without going thru the Restore process?

[iYeow]

No , you can't just remove it, you will need a restore. To preserve your baseband , you need a Custom firmware of 4.2.1. I can give it to you in your PM box.
When you received it, don't unzip, only rename .zip to .ipsw
Run redsn0w 0.9.6b6, browse to stock 4.2.1 , check only the box dfu mode.
Once you have DFU done, run itunes > shift + restore to this CFW of 4.2.1
If you have the new bootrom, after the restore you need to run redsn0w again to tether boot.
You will also need to install Cydia using Redsn0w.

Finally, update Cydia and install Ultrasn0w to unlock

[zyrl]

dear iYeow,

I've successfully restore and jailbreak

but after i install ultrasn0w, i couldnt get my local sim card to work.
it seems my baseband is incompatible.

5.15.04

Bootloader 06.04

erm? am i allowed to bump?

[Orby]

You can try to bump, but it'll merge your posts.

Use redsn0w 0.9.6rc8 to install Cydia (get your jailbreak) /and/ install the iPad baseband. Therein lies your unlock (ultrasn0w 1.2).

Unless you're stuck at the "Insert valid SIM to unlock" phase--in which case you'll need a SIM from the network that iPhone came from to activate first.

EDIT: You didn't use iYeow's custom firmware he sent you, did you?

[zyrl]

You can try to bump, but it'll merge your posts.

Use redsn0w 0.9.6rc8 to install Cydia (get your jailbreak) /and/ install the iPad baseband. Therein lies your unlock (ultrasn0w 1.2).

Unless you're stuck at the "Insert valid SIM to unlock" phase--in which case you'll need a SIM from the network that iPhone came from to activate first.

EDIT: You didn't use iYeow's custom firmware he sent you, did you?

Damn, that was my mistake. A price to pay. Hahaha.

But I read a lot of places to consider about iPad bb. Like cannot restore at iTunes, cannot downgrade,

So is it better to change to iPad bb or wait for my bb to be able to unlock?

[iYeow]

Well, you have already updated your baseband , so to unlock you have to go with ipad baseband.
What you could have done with only 4.2.1 shsh blob, you could have restored to custom firmware of 4.2.1 to preserve your 3.1.3 firmware baseband.