Iphone 4 Help stuck on Itunes screen

[Newiphone27]

Hi, I just purchased a iphone 4 that is stuck on "enter valid sim with no pin lock" screen. The guy said he thinks it was on iOs 4.2 because it was bought a few months ago. He also said it was a 32gb. How do I check what firware, version, baseband and model this is? Can I jailbreak this phone no matter what version and firmware? If so what tools do I use? Please give me a simple step by step or link to it.
Thank You all very much for your help and support

[Newiphone27]

BUMP, Can someone please help me out. I am new at this but learning as much as possible. Just looking for a short answer if possible from an experience user.

Thank You

[Simon]

You can use f0recast to find that stuff out.

[pratt1503]

Hi, I just purchased a iphone 4 that is stuck on "enter valid sim with no pin lock" screen. The guy said he thinks it was on iOs 4.2 because it was bought a few months ago. He also said it was a 32gb. How do I check what firware, version, baseband and model this is? Can I jailbreak this phone no matter what version and firmware? If so what tools do I use? Please give me a simple step by step or link to it.
Thank You all very much for your help and support

Download f0recast (google it) and connect your phone and run it and it should tell you the Firmware and Baseband you are on.

Could you not get a Sim card to put in it to see what it is on ?

Do you need to be unlocked, because there is no Unlock for 4.1 or 4.2.1,

This is the link for the Jailbreak.
iClarified - iPhone - How to Jailbreak Your iPhone 4 Using RedSn0w (Windows) [4.2.1]

(Windows)

But you are better off getting all the information first

Firmware and Baseband and telling us what you EXACTLY what you want from your phone

Then tell us and we will help you out

[Newiphone27]

I tried forecast and could not get a reading from it. I am running windows 7. I have not come across a AT&T sim card yet to put in it. I am waiting for an unlock to come out but would like to JB for now and play with it.

[Simon]

You can jailbreak it with redsnow then.

Tiny umbrella can also give you some of those things too like firmware version.

[pratt1503]

Ok the link provided above.


X98Car jumped in before me again LOL