Help ACER Z150 keyboard

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Please Help!!!!!
I am used Acer Z150(Liquid Z5)(Android 4.2). I had some useful data in my smartphone and not backup. I remember the pwd but I deleted all the keyboard accidently. Hence I cannot login when I power on my smartphone. I used the OTG cable but my smartphone not support. I try to upgrade to Android 4.2.2 and not successfully .
Please Help. I don't delete the useful data. I remember the pwd.