Originally Posted by The White Tiger
1. Find preferred boot animation.
2.Go to the root of your system files.
3.Look for folder labeled "System" go into that.
4.Find folder labeled "customize" go into that
5.Lastly look for "resource" Folder go into that
6.Get preferred boot animation Rename it to "vzw_bootup"
For the Verizon One the file name will actually be either hTC_bootup_one.zip or bootanimation.zip depending on the ROM (one of those two will be in that location). EclipticOne 4.4 uses the filename bootanimation.zip.
Edit: If the ROM you're using still has the stock Verizon boot animation running, vzw_bootup would be in there.
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Verizon HTC One - S-off'd
iPhone 4 - Retired (thankfully)
Motorola Droid - Retired