Preparing iPhone 3GS for sale

[loccie]

Hi folks,

I'm planning to sell my iPhone 3GS (US, locked to AT&T, firmware 3.1.3) on eBay.
First thing I need to do is to delete all my data from it. Last time, when I was running jailbroken 3.1.2 I did go to Settings->General->Reset->Erase all Content and Settings, and it really messed up my phone. Had to restore to 3.1.3 due to that.

I need the phone to stay at 3.1.3, so how do I make sure that all my data is deleted from the iPhone safely so that I don't have to do restore again. I am afraid Apple auth servers will not sign old 3.1.3 firmware and force me to upgrade to 4.0.

Thanks.

 

[mrmike316]

I have the same question, wanting to sale the phone but dont know what to do to keep the 3.1.1 on the phone.

 

[jsquared]

Please search.....https://forums.macrumors.com/threads/944452/

lol i've never gotten to say that

but seriously use the search function. think to yourself "maybe i'm not the first db to ask that...?"

 

[mrmike316]

Please search.....https://forums.macrumors.com/threads/944452/

lol i've never gotten to say that

but seriously use the search function. think to yourself "maybe i'm not the first db to ask that...?"

Yeah thanks have been searching to no avail. that link is for j/b phones