Is it possible to downgrade to iOS 4.0.1?

[sg01]

I am new to the iPhone and was wondering if anyone could let me know if it is possible for me to downgrade to iOS 4.0.1.

My phone currently runs 4.0.1 and I have been thinking of updating to iOS 4.1. I do have a slight proximity issue and would like to try the latest update. However, after reading up it seems that some people have not resolved this issue by upgrading.

I want to see if I will be lucky with the update. Does anyone know if I can downgrade if it doesn't work out for me? I do not want to jailbreak my phone, if this helps. Also, I have a factory unlocked phone so I have no worries about the unlock option.

 

[mlts22]

Make sure your SHSH blobs are saved via TinyUmbrella before you do *anything* else.

 

[sg01]

Make sure your SHSH blobs are saved via TinyUmbrella before you do *anything* else.

Thanks for the advice... I will read up on this as I've not heard of it before.

 

[Applejuiced]

Thanks for the advice... I will read up on this as I've not heard of it before.

If u didn't save your shsh files earlier can't do it now. If u upgrade to 4.1 u will never be able to downgrade it.

 

[sg01]

If u didn't save your shsh files earlier can't do it now. If u upgrade to 4.1 u will never be able to downgrade it.

I haven't updated my OS yet. I thought of asking around if it's possible to downgrade and I'm glad I asked.

Will I need to jailbreak my phone to downgrade?

Could someone provide me a link on the instructions to downgrade?

 

[Applejuiced]

I haven't updated my OS yet. I thought of asking around if it's possible to downgrade and I'm glad I asked.

Will I need to jailbreak my phone to downgrade?

Could someone provide me a link on the instructions to downgrade?

No, even if you JB it now you will not be able to restore or downgrade it to 4.0.1 any more.
You had to grab your shsh's from Apple while they were still releasing them before 4.0.2 came out.
Now all you can get is 4.1 shsh's

 

[shakeman0]

Can you downgrade if you download ios 4.01 from the internet, and than force the phone to restore to that file?