One glitch I have encountered is with one particular contact in my list. When this contact calls my phone, either from her land line or cell, or if I call her cell or land line from my Z10, the device goes into a "schizoid embolism" ... screen shrinks and goes back to normal as if you are swiping up on the home screen. Will not stop, only way is to pull battery ... can't even do a soft restart. The call goes through, but renders the device useless until battery pull. Hers is the ONLY contact that does this. I've tried deleting the contact and creating new profile for her ... nothing.
Perhaps the fact this contact is my mother-in-law has something to do with it, but I highly doubt it. Haha