You would have noticed that Push Notifications are not working on jailbroken and hacktivated iPhone 2G/3G/3GS on firmware 3.1.2. This tutorial will help you to enable Push Notification on your iPhone on firmware 3.1.2, all you need is an unlocked or jailbreaked iPhone.  your iPhone and follow step-by-step procedure given below.

Steps to Enable Push Notifications On iPhone 2G/3G/3GS on firmware 3.1.2

We had try this method working :

Start Here : go to cydia - source - add source - add " fishbone.ge "  to section P install the Push notification Fix after the phone will restart your Youtube should working now, if still not working try the next steps bellow,

Step-1: There shouldn't be any "push-capable apps" installed on your iPhone, you need to uninstall all Push-capable apps from your iPhone, if there are any.
Step-2:

• Start "Cydia" on your iPhone.
• Touch on "Manage" tab on the bottom.
• Now touch on "Sources" as seen in the screenshot Left

Touch on "Edit" and then on "Add". You will be prompted to enter a url source as seen in the screenshot below. Type "http://cydia.iphoneil.net" and touch on "Add Source"

Cydia will now automatically update your sources with a series of automated steps.

Step-3: After installation, search for "Push Fix" application in Cydia and install it. This application will fix Push Notifications on your jailbreaked and unlocked iPhone.

Step-4: After installation of "Push Fix" application, you will need to Restart your iPhone before you install any "push-capable apps" your iPhone.