stock rom galaxy

[Metal Militia]

Will restoing to any untouched stock remove carrier start up and shut down animations ....

Metal Militia AC App

 

[Rukbat]

The animations are part of the stock ROM. (A stock ROM is a carrier-specific ROM.) You can't flash a "generic Android" ROM - it has to be a ROM for your phone - which has been worked on by, among others, the carrier..