<div>
So long as you do not mess up the phone while downgrading, the provider will not be involved...<br />
<br />
If there is a problem with the phone as a result of the downgrading, the warranty might not be available to help you with problems.
</div>


So long as you do not mess up the phone while downgrading, the provider will not be involved...

If there is a problem with the phone as a result of the downgrading, the warranty might not be available to help you with problems.

<div>
There should be no problem doing this. Worst case you can always just plug it into iTunes and upgrade it again.<br />
<br />
Just out of interest, why do you want to downgrade?
</div>


There should be no problem doing this. Worst case you can always just plug it into iTunes and upgrade it again.

Just out of interest, why do you want to downgrade?

<div>
<div class="content wysiwyg-content">
i just bought a iphone with the firmware 4.3<br />
<br />
i need to downgrade it to 4.2 but my only concern is if i do this downgrade<br />
<br />
what will append with my phone provider. <br />
<br />

</div>
</div>


i just bought a iphone with the firmware 4.3

i need to downgrade it to 4.2 but my only concern is if i do this downgrade

what will append with my phone provider. 



restauring iphone

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.