Restore question

[lennie paz]

My greenpois0n jailbroken iPhone 4 was acting strange for the past couple weeks so I did a restore. I was previously on firmware 4.3.1 but I noticed after the restore, I am now on 4.2.10? I thought you couldn't downgrade? Anyhow, iTunes is saying that 4.2.10 is the latest firmware when I click on check for update. I am on Verizon and want to jailbreak the iPhone again. What is my best bet, upgrade to 4.3.1 and use greenpois0n? How do I get to 4.3.1 if iTunes is saying 4.2.10 is the latest?

I'm an idiot,please delete. I'm in the wrong forum!

[iYeow]

Don't think Verizon phone can have IOS 4.3.1, it is only GSM phone that has this firmware. You want to downgrade to 4.2.8 , is that what you want ? You need shsh blob for this downgrade.

Check with tiny umbrella and download your shsh blob from cydia if you have it, otherwise no downgrade.