Hello, recently got a 16gb iPhone 3gs old bootrom (was at 4.1 BB 5.16.02)
Just upgraded BB to 6.15.00 and firmware to 5.0.1. The phone is jailbroken, cydia works (cydia has 4.1 shsh saved)
The issue I seem to be having is getting my t-mobile sim card to be recognized by the phone. ultrasn0w has been installed, phone was rebooted.
I used:

redsn0w 0.9.9b8 (for jailbreak)

latest itunes downloaded from apple (upgrade to 5.0.1)

used firmware 5.0 with redsn0w

ABOUT:
Version 5.0.1 (9A405)
Carrier: AT&T 11.0
Model: MC136
Modem Firmwaer 06.15.00

Phone shows No Service instead of carrier
Network: Not Available


Help Would be appreciated



Update: Turned airplane mode on, as soon as it was turned off Invalid SIM replaced the No Service on phone, took SIM card out, back in now says no service again. Also "Could not activate cellular data network" popped up.

ultrasn0w is not yet compatible with iOS 5.0.1. The only workaround is to replace the CommCenter on your phone running iOS 5.0.1 with the CommCenter from iOS 5.0. Search through the forums for Wortel's CommCenter Patch or follow these steps (liberated from another forum post):

1) Jailbreak the iphone 3GS on iOS 5.0.1.

2) Make sure Ultrasn0w is NOT installed, if it is, uninstall and reboot. Remove SIM just in case...

3) Replace old CommCenterClassic at /System/Library/Frameworks/CoreTelephony.framework/Support with newly-patched iOS 5.0 version from Wortel.

This is done by SSHing to the device from your Mac/Linux box. Install OpenSSH on phone if needed, and remember to change from default password (alpine)(command passwd) if you do.

4) Run "ldid -s CommCenterClassic" and "chmod +x CommCenterClassic" in MobileTerminal on iPhone or via SSH from your Mac/Linux box as root user (Command: su).

5) Double-check that the permissions for the patched file are set to 755.

6) Install Ultrasn0w, reboot device, insert SIM and hope for the best.

I haven't tested this personally, don't have the hardware to do so -- but reports around the internet are pointing to this being successful.

Originally Posted by n1ckn4m3

ultrasn0w is not yet compatible with iOS 5.0.1. The only workaround is to replace the CommCenter on your phone running iOS 5.0.1 with the CommCenter from iOS 5.0. Search through the forums for Wortel's CommCenter Patch or follow these steps (liberated from another forum post):


I haven't tested this personally, don't have the hardware to do so -- but reports around the internet are pointing to this being successful.

Thank you soo much! got the 3gs working with T-mobile on 5.0.1.

[When I get home I am going to try same method on an 16gb iPhone 4 running 5.0.1 BB 04.11.08, have you seen any confirmations that the same method will successfully work with iphone 4? Or are there different protocols for an iPhone 4? Tried looking it up Google, only seem to get iPhone 3gs responses] Nevermind just looked at ultrasn0w only compatible with iPhone 4 bb 01.59.00 :\ dang lol

Originally Posted by ibugmenot

pleas help us!!!!!!!!!!!!!!

Let me know if you still need help with it, if you're in the same situation as I was. (3GS firmware 06.15.00 5.0.1)
I can PM you steps to what I did to accomplish this

Originally Posted by nerdbeast

Thank you soo much! got the 3gs working with T-mobile on 5.0.1.

When I get home I am going to try same method on an 16gb iPhone 4 running 5.0.1 BB 04.11.08, have you seen any confirmations that the same method will successfully work with iphone 4? Or are there different protocols for an iPhone 4? Tried looking it up Google, only seem to get iPhone 3gs responses

Am unsure, hate to say. Can't find anything definitive on either.

Originally Posted by nerdbeast

Let me know if you still need help with it, if you're in the same situation as I was. (3GS firmware 06.15.00 5.0.1)
I can PM you steps to what I did to accomplish this

My iphone is exactly like yours. After jailbreak and unlock sucessfuly, it does not recognize T-mobile sim.

Please show me the steps that you did on your phone.

Thank you very much for your help.

i hope you have fixed your problem. I had the same problem 2 weeks ago with 3gs.
what i did was to download redsn0w but a prior verison and install the ipad baseband again
I think while upgrading to ios 5 some how corrupted the ipad baseband so you have install it again after you get ios 5

Hi friends. Very important: No upgrade to 06.15.00. Imposible downgrade. Firm modem collapse it on the try. Best revew this:

"http://www.actualidadiphone.com/2011/01/06/tutorial-downgrade-de-la-baseband-06-15-00-a-la-05-13-xx-en-iphone-3g/"

Regards.

Originally Posted by tomahoc66

Hi friends. Very important: No upgrade to 06.15.00. Imposible downgrade. Firm modem collapse it on the try. Best revew this:

"http://www.actualidadiphone.com/2011/01/06/tutorial-downgrade-de-la-baseband-06-15-00-a-la-05-13-xx-en-iphone-3g/"

Regards.

Yes, that's correct. Once you upgrade to 06.15.00, you cannot go back unless you have the original bootloader on the 3G which allows fuzzyband to downgrade. Less than about 5% of the 3G models in current circulation (estimated) have the old bootloader, so this is not applicable to most people who will read this. Only the very first model 3G can downgrade the baseband.

This was the only method that worked for me since ultrasn0w didn't work. Just download the ultrasnow files and DiskAid to access the files on the iPhone and just drag and drop the unlock files to the phone. restart the phone 2 times and you'll see the T-Mobile service. I guarantee you.
How to Unlock iPhone 3g & 3gS WITHOUT Wifi on 4.1 & 4.2/4.2.1 firmware - YouTube
I did it on iOS 4 and ios 5 on my 3GS and I use T-Mobile.