Downgrading your iPhone Firmware is very easy and you can do it on your own through the internet and by using the TinyUmbrella (Mac). There are proper steps and stages of doing so and if you follow these then no problem will arise for you in meeting your goal. But one thing to mind here is that before starting to follow these, you will first have to save your SHSH Blobs for the firmware to which you want to downgrade your phone. It is actually to downgrade to the iOS 4.3.3 firmware for which you can take help of this tutorial and for this you will have to use JailbreakMe.
Check out and follow the steps below:
1. Firstly, you have to start with downloading and installing TinyUmbrella.
