iPhone 3GS Update to 4.2.1 and Baseband Preserve

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This Youtube link proved excellent (except, well for the Push Notification due to the Hacktivated release). http://www.youtube.com/watch?v=6oW9VZ_OXRQ. SHSH blobs in Cydia or TinyUmbrella is a must have.


I found a fix for the issue where the Push Notification does not work after hacktivation.


1- Uninstall ultrasn0w, Push Fix, Doctor Push, etc.
2- Install SAM (see http://jaxov.com/2011/03/how-to-activate-iphone-4-3gs-on-ios-4-3-ios-4-3-1-using-sam/ on how to do it).
3- Follow the steps in 2 on how to bring the phone from Hacktivated to ActivateWildcard state. NOTE: you will not need your original sim.
4- Install ultrasn0w now.
5- When in that state, uninstall iPusher, and reinstall it. Push notifications should work.
6- If not, that is easy: go ahead and backup activation and restore activation from SAM.
7- Delete and reinstall iPusher. Now it should work.
8- Reinstall all the apps that required the push notification feature.