iPhone 4 4.3 gsm updating to 5.0.1 hicups

[94stanggt]

Hello everyone. Hope I provided enough background info on my situation so that this can be figured out.
Im using my Macbook running OS X 10.5.8. My phone is an iPhone 4 that was running 4.3 (8F190) with a baseband of 04.10.01

I am using Gevey to use the phone on T-Mobile. Bought the phone on Ebay and it had Cydia installed when I first booted it up. To get the phone going at first I just had to follow the steps of calling 112 and toggle on and off airplane mode till it found T-Mobile and it ran pretty well. Only thing that gave me trouble was that whenever I tried to run Cydia it would crash and return to home screen. (Same with Safari, but that is the least of my worries right now) So I never had anything on the phone that is not saved on my computer somewhere.

I went to a few sources to confirm and learn the steps to updating to 5.0.1 and preserving the 04.10.01 baseband so my Gevey would still work. I followed these steps on the webpage below using the newest version of Redsn0w.

iClarified - iPhone - How to Jailbreak Your iPhone Without Updating the Baseband (Mac) [5.0.1]

As iTunes finished updating the phone with the NO_BB IPSW that Redsn0w created, iTunes displayed that the SIM card is not supported (cause its the Gevey with a T-Mobile card in there.) I am now not sure what to do to get the phone activated and run on the T-Mobile network.

*edit*
Also, I could probably toss in a friends SIM card from their gsm iPhone and activate the phone that way. Though if I can get it to work through using Redsn0w or other software I think I would want to go that route.

What I want to make sure is that when I put my Gevey & T-Mobile card in, will I be able to follow the steps of calling 112 and toggling on and off airplane mode will the phone pick up the T-mobile network?
*end edit*

Do I now jailbreak using Redsn0w or ...? I just want to be sure that I can keep my baseband and not loose it.
Please help me out here. Thanks in advance!

[94stanggt]

Bump.
Nothing, really? I would like to get my phone working again please.

[Simon]

If you dont have an ATT sim to activate with you can use redsnow to hactivate it by jailbreaking.

[94stanggt]

So its just as simple as following the jailbreaking steps found here?
iClarified - iPhone - How to Jailbreak Your iPhone 4 Using RedSn0w (Mac) [5.0]

The post sticked on ya Simon (Can I Unlock?) is just making me scratch my head a bit. Will my Gevey no longer work if im on 04.10.01 and iOS 5.0.1?
Quote
iPhone 4

Baseband Firmware Unlock

1.59.00 4.0/4.0.1/4.0.2 Yes (Ultrasn0w)
2.10.04 4.1 Gevey Sim
3.10.01 4.2.1 Gevey Sim
4.10.01 4.3.X Gevey Sim
4.11.08 5.0/5.0.1 None
End Quote

[Simon]

As long as you have preserved your baseband with a custom 5.0.1 firmware then your gevey will still work.

[94stanggt]

Awesome. Doing it now. Ill let ya know how it goes.

Thank You Simon! Took a few tries to get the phone to find the T-Moblie network, but everything is up and running just fine. Thanks for helping out a newbie.
Hope you enjoy your weekend!