Unlocking Iphone 3gs custom firmware version 4.3.3 baseband 6.15.00

[blackice445]

I use this video ‪How To Restore & Update 6.15.00 iPhone 3Gs to 4.3.3 Firmware & Unlock Untethered!‬‏ - YouTube

to unbrick my phone then I tried to unlock with redsnow but after I unlocked I get no service. It searches then it says no service. someone please help.

[Mes]

Did you install Ultrasn0w (via Cydia) to unlock?

[blackice445]

Yes I did.

Sorry I meant ultrasnow not redsnow in my first post.

[Mes]

Check Settings / General / About.... 4.3.3 + 6.15.x modem firmware?

[blackice445]

Yeaah thats what it is.

[Mes]

Select Settings / Carrier. It will search for cellular networks for a few minutes.
Is your network listed? If you select it, what happens?

[blackice445]

It says unable to load network list.

[Mes]

Try reinstalling Ultrasn0w (via Cydia), the reboot at least 2 times.

[blackice445]

I've done that like 5 times. But i'll try it again.

[blackice445]

Any other suggestions?

[ihappy]

I would restore with cfw and then just rejailbreak and install ultrasn0w again.

[Mes]

+1. Normal solutions failed, time to start over

[blackice445]

I would restore with cfw and then just rejailbreak and install ultrasn0w again.

I did this twice.

[Mes]

Did it twice, successfully? Any iTunes errors?

[blackice445]

No errors. I restored using the custom firmware 4.3.3 and the software iREB while on baseband 6.15.00 and I still have no service. I dont know what to do.

Is an official carrier SIM card just at&t?

[Mes]

No errors. I restored using the custom firmware 4.3.3 and the software iREB ...

No errors? Why did you use iREB?

Maybe a better questions is: How / what utility did you use to create the custom firmware and load it?

[blackice445]

Right now im using redsnow but before I used the one from that video i posted in my original post.

[Mes]

And what utility did you use to create the cfw?

[ihappy]

Is an official carrier SIM card just at&t?

Yes. If its gsm then its att. If its cdma then its verizon.

[Mes]

Yes. If its gsm then its att.

If in USA, GSM is AT&T