Nice, It should activate now, mine took awhile. If it doesn't activate try turning FaceTime off and on.

Try turning on and off airplane mode.

Just restore 3GS to 4.3.3, saved shsh blob on 5.0.1. Hope they can find a way to restore to 5.x.x.

Thanks to @notcom for a great tool.

Happy thanksgiving to all jail breakers :)

In order for you to restore to firmwares that apple is not signing anymore, you need shsh blob with Tiny Umbrella, locally or through Cydia.

At this time only firmware you can restore to is 5.0, without shsh blobs.

Download and run Tiny Umbrella, and save shsh blobs see what is saved, if you don't have shsh blobs saved you will not be able to restore. There is no way you'll be able to restore to 4.3.5.

Check and see any blobs are saved.

Check out iclarified.com for some excellent tutorials.
http://www.iclarified.com/entries/index.php?page=...

add this source, cydia.pushfix.info, and install tmobile mms setting 4.x.x.

After installation the phone will reboot, afterwards you will need to enter the apn setting for your celluar and mms, then reboot again.

Remember you'll need boot thether via redsn0w after each boot.

You need shsh saved for firmware you are trying to restore. No shsh, no restore.

Reason you are getting that error is because apple is not signing the firmware you are trying to restore.

4.3.5 is only firmware apple is signing at the moment.

Occurs when trying to install an old firmware and Apple's server disallows the installation. The only solution is to have SHSH backup and modify the hosts file to point to Saurik's Cydia Server where they are backed up (or localhost if you have it yourself).

Please keep those comments to yourself, comments like that will not motivate @notcom to create better tools for us.

Keep it clean.

I'm puzzled too, I have two factory unlocked iPhone4 in my household, I was able to get data tab using pushfix.
He did mentioned factory unlocked.

Try uninstalling mms fix then install carrier fix first.
I was able to get my data tab by installing those two items.