Member Since: Jul 17, 2009
Mac Specs: 27" i7 iMac, 24" iMac, 13" Macbook Air, iPhone 5 & 5S, iPod Nano 7th Gen, iPad 2 16GB WiFi, iPad 3
01-31-2013, 04:18 PM
Since you've already upgraded, it isn't easy to say what was on there before as it entirely depends on whether you've been upgrading with each release of iOS or not..
Also, there is no "official" way of going back to an older version of iOS, the method of downgrading usually involves having 2 key pieces, 1) the iOS firmware for the previous version and 2) a backup of your phone on THAT version of iOS to restore to.
Not having the 2nd piece means that you could downgrade but would be left with a pristine clean iPhone without any of your information. Not having the 1st locally is inconvenient since you have to go searching for that binary. Any instructions you find about downgrading will address both these situations and tell you what exactly to look for.
One of the primary requirements for Snow Leopard is an Intel-based Mac. Tell us what Mac you have and we can tell you if this is even an avenue you can pursue.
Be sure to read the Community Guidelines | The more information you provide, the better answers you get, remember GIGO.