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We have two ways to assign shortcut keys:
1. From the Homescreen press and hold any key, a message board that appears, select Yes to switch to contacts, select, done!
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2. From Call Logs screen, swipe from the top down, select KeyPress Speed Dial, select the desired character set.
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Note:
BlackBerry Z10 is not made for you Show Keyboard though, because there is no KeyPress Menu Call Speed Dial
I wish you success!
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