[Q] device unauthorized at bootloop

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By monkey_kungfu, Junior Member on 9th July 2014, 09:15 PM
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I managed to get stuck in a boot loop after installing CM 11 on ascend U9200.
I try to using adb shell, it says:
error: device unauthorized. Please check the confirmation dialog on your device.
iam at bootloop and stuck at logo huawei, of course I cannot boot my device to confirm authorization.
How can I use adb without first being authorized?

i was tried :
1) Remove /data/misc/adb/* - Failed, same problem
2) Try different ROMs - Failed, same problem
3) Try different usb cable OR usb port - Failed, same problem
4) Removed all drivers and installed them again - Failed, same problem
5) Updated android-sdk - Failed, same problem
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