The Xbox360BadUpdate exploit reliability is completely random and unpredictable. It is very unlikely that doing anything will actually improve the speed of the exploit, since it is based entirely on random numbers your Xbox made when it was turned on.
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Those sounds are pulled from the NAND??
it definitely works on other languages and I've got to freemyxe 3-5 times before
though stupidly enough it worked right away after trying switching to english lol (can always be a coincidence)