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this article we are going to offer you the guide to enable video recording 720p native on iPhone 3GS. They can follow the steps indicated only users in possession of a jailbroken device,Since this is a rather complex procedure, we recommend novice users not to venture into this kind of changes to avoid problems and malfunctions of the device.

HD recording on iPhone 3GS Video



Backup

It is important to make a complete backup of the device before, In all probability this process will be automated and in time will carry a rather small tweak in Cydia that will greatly simplify the installation.So if you're not sure do, our advice is to wait for few more days.

Necessary

* iPhone 3GS Jailbroken, with IOS 4.1 (not tested on previous versions)

* OpenSSH from Cydia

Install

Step 1: Download HDVideo3GS.zip file from here.
Step 2: Navigate to /System/Library/CoreServices/SpringBoard.app/ directory and copy the N88AP.plist file in this location as shown in the screenshot below.
HD Video Recording on iPhone 3GS
Step 3: Now navigate to /System/Library/PrivateFrameworks/Celestial.framework/N88/ directory and copy AVCapture.plist, CameraRollValidator.plist and MediaValidator.plist files in this location as shown in the screenshot below.
HD Video Recording on iPhone 3GS
Step 4: Now simply restart your iPhone 3GS and you are done !

Via : redmondpie