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Error: 21 (Signature verification failed) #24

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windows95guy opened this issue Sep 22, 2020 · 0 comments
Open

Error: 21 (Signature verification failed) #24

windows95guy opened this issue Sep 22, 2020 · 0 comments

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@windows95guy
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My phone is a Samsung Galaxy S7 running Android 8.0. I'm trying to undo a bad Substratum theme install. All my phone can do is turn on, show my lock screen, and get into Emergency Mode. I can get into recovery mode in Android boot. Thats how I'm trying to boot your product off an SD card. Please help me! I need my phone to work again.
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@windows95guy