Hi!

Thanks for such a new release... I am having a little issue here. I am able to save my iPhone5 6.1.2 SHSH blobs locally. However I am unable to save the 6.1.2 blobs from my GSM iPhone4. Is there something to write about home in this case? Thanks!

… Halfway done…

For some reason I was not feeling comfortable with redsn0w for creating a custom firmware, so I did the following:

11. Create a custom 5.1.1 firmware preserving the 6.15.00 baseband.

11.1. Download the latest PwnageTool 5.1.1.
11.2. Download the iPhone2,1_5.1.1_9B206_Restore.ipsw firmware file.
11.3. Create a new firmware file, select the iPhone 3G, 3GS option and follow the onscreen instructions.
11.4 After the software cooks a Custom Restore file follow the instructions to put the phone into DFU mode again. -- Wait for it to reboot. Close PwnageTool when requested to.
11.5. After initial reboot (since this is not my phone), I skipped the iCloud accounts and so on. Enabled location services even though I was running a GPS incapable baseband for this hardware.

12.0 Test again the Phone Network under this firmware.

12.1 Connect the phone to the WiFi Network.
12.1 Update and upgrade Cydia packages as requested.
12.2. Install Ultrasn0w. Follow the onscreen instructions as did before.
12.3. Respring the phone, and or reboot it. Insert your SIM card (if it was not already there). ;)

- At this point your SIM card is detected and your phone connected to the GSM network.
- Note that GPS is STILL knocked down since we are using iPad's baseband.

The final --yet scary-- step: Baseband Downgrade.

Start again redsn0w, and I am quoting exactly Dev-Team's words:

13.0. Connect your iPhone in normal mode, then click “Jailbreak” after redsn0w identifies its model and BB version (you needn’t pre-select the IPSW anymore).
13.1. Choose the “Downgrade from iPad baseband” option (you needn’t worry about de-selecting Cydia anymore).
13.2. Do a controlled “slide to power off” shutdown of your phone and proceed through the normal DFU ramdisk steps.
13.3. Follow the onscreen instructions, -- please bear in mind this may take a little while flashing the baseband --.
13.4. Wait for the final reboot.

14. Final check.

- Check the baseband version once booted.
- The final result: iOS 5.1.1 (9B206), Baseband 05.13.04. Location services and GPS working; 3G access working too.
- Total time 3 hours.

Again. Thanks Dev-Team for releasing such wonderful set of tools, and thanks community for an awesome support to all of us. I hope this long post is just as useful as the ones followed by me during these years.

Cheers.
;-)

Start:
1. Check the manufacturing dates on the iPhone.- I checked the manufacturing dates and this phone was built in 2009, week 38 (87938XXXXXX -- 9, for 2009, 38 the manufacturing week), so I wouldn't fry the baseband while flashing.

2. Check BootROM versions.- Download the latest redsn0w (0.9.14b2), unpack, and run it.
2.1 Plug in your your iPhone while running redsn0w. Check the BootROM in the lower part of the window. In my case said the following: Connected iPhone 3GS (4.3.3, 05.16.02, BR New).
2.2. Close redsn0w.

3. Check for SHSH blobs availability.-Fortunately some SHSH blobs were stored in Cydia before [4.3.3], and got them via TinyUmbrella.
3.1. Get the latest version of TinyUmbrella and install the package file.
3.2. Open it and clicked the advanced Tab in the middle of the screen.
3.3. Click the checkmark for "Request SHSH from Cydia).
3.4. Make sure [Set Hosts to Cydia on Exit] is not marked.
3.5. Click on the device on the left pane of the window.
3.6. Click on the [Save SHSH] button. I retrieved then the 4.3.3 SHSH blobs.

4. Download Apple's stock 4.3.3 firmware (iPhone2,1_4.3.3_8J2_Restore.ipsw).

5. Start the TSS Server in TinyUmbrella.

6. Downgrade from iOS 4.3.5 to 4.3.3.
6.1 Set the phone in DFU Mode (this might not be needed but I just did it).
6.1.1. Do a safe shutdown of the phone while holding power and slide the red button [slide to power off] to shut down.
6.1.2. Press the [power] and [home] buttons for 10 seconds
6.1.3. After the 10 seconds release power and leave pressed [home] for 10 seconds.
6.1.4. iTunes popped up saying that found a phone in recovery mode.

6.2.0. Press the [Alt] key while clicking on the [Restore] button.
6.2.1. Wait for iTunes to restore the Phone. Meanwhile click on the [Log] tab in TinyUmbrella to see what is happening behind the stage.
6.2.2. Wait for the phone to finish.
6.2.3. Close TinyUmbrella after finished rebooting. I had no errors while performing this.

Once in 4.3.3., proceed to Jailbreak and Flash iPad's Baseband on the phone.

7. Open redsn0w again and click the [Jailbreak button]
7.1. Make sure [Install Cydia] and [Install iPad Baseband] buttons are marked.
7.2. Click next and follow the on-screen instructions. The software prompts for the BootROM version checked previously.
7.3. Put the phone in DFU mode as instructed and wait for the software patching and exploits to finish.
7.4 After the initial boot hacktivation occurs. Check the baseband version. It should be 06.15.00

Verify the phone functionality is working.

8. Connect the phone to your WiFi network.

9. Do an initial update and package upgrade of Cydia. Follow the onscreen instructions.

10. Install ultrasn0w, and its package dependencies. Respring the phone, and or reboot it. Insert your SIM card.

- At this point your SIM card is detected and your phone connected to the GSM network.
- Note that GPS is knocked down since we are using iPad's baseband.

0. Base Prerequisites.
0.1 A WiFi reliable network.
0.2 Non-proxied Internet access from this WiFi network.
0.3. GSM iPhone 3GS.
0.4 A reliable computer with no bloatware (I tried first with a Windows 7 starter machine, and Windows did it again :)). -- I swapped it by my old-but-trusty Mac (OSX Lion 10.7.4, iTunes 10.6.3, 64 bit).
0.5 SHSH Blobs previously saved.

Hi. Perhaps, not the best way, but let me share my experience.

Got an iPhone 3GS which had the following: iOS 4.3.5, baseband 05.16.02. I downgraded to 4.3.3, (since it was the last SHSH blobs registered for this device), then using the latest redsn0w 0.9.14b2 upgraded to iPad's baseband 06.15.00, then checked for GSM support via ultrasn0w 1.2.7; everything ok this far. I then used PwnageTool 5.1.1 to cook a custom restore file under 5.1.1, DFU, restored to it, used ultrasn0w again to check for GSM support, being okay again. Finally I used redsn0w to downgrade iPad baseband to 05.13.04. After doing this, full GPS support and location services worked again. Pretty good indeed.

In your case you don't need the 4.3.3 downgrade, and you may do everything using redsn0w. The bottom line is yes, you can upgrade the phone all the way to 5.1.1 safely.

Best of luck! Cheers! =)

Reset network settings and then rejoining the WiFI AP should help...

Dear experts.

Thanks for releasing such a fantastic set of tools. I was curious about the iPad baseband update, and luckily for me, a colleague at work gave me his jailbroken & unlocked iPhone 3GS, -but screwed- since he connected it to iTunes trying to update it, long ago and updated from 4.3.3 to 4.3.5 upgrading the baseband.

Since then. -more than one year- it became an iPod touch running iOS 4.3.5 baseband version 05.16.02.

I am posting below the steps taken in order to upgrade it all the way to 5.1.1, and the carrier unlock for it. All steps were taken under OSX. Please note, this is only a high-level view of the process. It does not go in detail on every step, so it is up to you to Google a bit if you are uncertain at some point. Everything is scattered out but documented out there… ;)

This is only to thank all what I have received from you throughout these years since the original iPhone came out, and give back some advice if somebody finds himself or herself in the same situation. Some steps may not be optimal, but this is what I actually did.

Hi again.

I've been busy too. Sorry for such a late answer: As orbit and techtimeout said earlier, besides having a jailbreakable firmware, you need a compatible baseband that can be unlockable (so you can get back your T-Mobile service). If you don't have any of those baseband versions mentioned below, then it is unikely you can get phone service with a software based unlock, such as Ultrasn0w.

Have you checked your version (by going into Settings --> General --> About --> Modem Firmware)?

Besides that, as dhlizard mentioned earlier, we need to know the first five numbers of your serial number. Those numbers indicate the date of manufacturing of your iPhone 3gs (year and week). If your manufacturing date is above of week 33 of 2011, your phone will have a newer baseband chip which cannot be unlocked.

Could you please get back to us with those values? That way we can determine whether your factory upgrade is reversible or not.

--
Namaste :)

Hi GypsyHeart.

I haven't done jailbreaks / unlocks on 3gs hardware in quite a while. Could you please post the following? (Just go to Settings -> General -> About)

- iPhone iOS version. (Print the whole thing, software version and IPSW revision; e.g. 5.1.1 (9B208)).
- Model.
- Modem firmware.

How did you upgrade to your actual iOS running version? (please describe any tutorials / steps you followed in order to get to your actual state).

Again: It's been a while since I did this on 3gs hardware (**I don't own an iPhone 3gs, but an iPhone4), so procedures may vary, depending on the hardware you are running iOS on.

Being as accurate as possible might give you a better chance to get your phone up and running.
--
Namaste. :)

Hi experts.

Just to report I just jumped into the 5.1.1 bandwagon! I used PwnageTool_5.1.1 and cooked a custom restore ipsw, installed it and everything worked smoothly. Now I have a running 5.1.1 iPhone 4, and restored SAM tickets to get my activation back. Everything seems nice so far, but still testing. ;)

Dev-Team and Community, thank you so much to make this happen. :)