Suffered by the same "blackout" issue for both iPhone 6s and iPhone 7 plus, though it happened when I tried to power on the phone and there was no response for less than 1 minute. Fortunately the phone would work again after several trials.
My best guess is some bug of iOS 11 while hoping it would be resolved sooner.
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Btw, the iPhone 7 plus frequently sticks on black screen with spinning wheel after upgrade to iOS 11 by OTA. Though these issues are tolerable so far comparing to the effort needed for a complete backup and recovery, which was indicated [https://discussions.apple.com/thread/7683091?start=0&tstart=0|Apple Forum].
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Btw, the iPhone 7 plus frequently sticks on black screen with spinning wheel after upgrade to iOS 11 by OTA. Though these issues are tolerable so far comparing to the effort needed for a complete backup and recovery, which was indicated [https://discussions.apple.com/thread/7683091?start=0&tstart=0|to be ineffective].
Suffered by the same "blackout" issue for both iPhone 6s and iPhone 7 plus, though it happened when I tried to power on the phone and there was no response for less than 1 minute. Fortunately the phone would work again after several trials.
My best guess is some bug of iOS 11 while hoping it would be resolved sooner.
-
Btw, the iPhone 7 plus frequently sticks on black screen with spinning wheel after upgrade to iOS 11 by OTA. Though these issues are tolerable so far comparing to the effort needed for a complete backup and recovery.
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Btw, the iPhone 7 plus frequently sticks on black screen with spinning wheel after upgrade to iOS 11 by OTA. Though these issues are tolerable so far comparing to the effort needed for a complete backup and recovery, which was indicated [https://discussions.apple.com/thread/7683091?start=0&tstart=0|Apple Forum].
Suffered by the same "blackout" issue for both iPhone 6s and iPhone 7 plus, though it happened when I tried to power on the phone and there was no response for less than 1 minute. Fortunately the phone would work again after several trials.
My best guess is some bug of iOS 11 while hoping it would be resolved sooner.
+
Btw, the iPhone 7 plus frequently sticks on black screen with spinning wheel after upgrade to iOS 11 by OTA. Though these issues are tolerable so far comparing to the effort needed for a complete backup and recovery.
Suffered by the same "blackout" issue for both iPhone 6s and iPhone 7 plus, though it happened when I tried to power on the phone and there was no response for less than 1 minute. Fortunately the phone would work again after several trials.
My best guess is some bug of iOS 11 while hoping it would be resolved sooner.