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'''IOS15''' was previously used by some official channels; it has not been stubbed because the [[Internet Channel]], which could not be updated through standard updates, previously used it.
'''IOS15''' was previously used by some official channels; it has not been stubbed because the [[Internet Channel]], which could not be updated through standard updates, previously used it.
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Some versions of IOS15 contain some [[Broadway]] code including the [[NAND Boot Program]]; the purpose of this code is unknown, but it is identical to [[IOS21]].
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Some versions of IOS15 contain a copy of the [[SDK]]; these were probably originally development versions.
In the past, this IOS was often used by homebrew, as it is one of the only known IOSes that is safe to downgrade on [[RVL-CPU-20]] Wiis. It was then used to patch the [[signing bug]] back into newer IOSes, like [[IOS36]].
In the past, this IOS was often used by homebrew, as it is one of the only known IOSes that is safe to downgrade on [[RVL-CPU-20]] Wiis. It was then used to patch the [[signing bug]] back into newer IOSes, like [[IOS36]].