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by (Genius) (10.4m points)
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Hi. From an internet browser, login with the same Gmail account you synced on the Mobicel Vivo http://www.android.com/devicemanager Then select the Vivo if you have more than one devices. You should then be able to unlick the Vivo from there. Let us know.
I tried it but it don't show any forgot pattern
by (Genius) (10.4m points)
Sorry for my ignorance. This is no longer available on Lollipop 5.0+ I mean to update my answer now.

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