I updated from phone 8.1 to the new 10 Mobile build 10136 and now I am unable to get passed the Enter PIN screen. Due to restrictions enforced by my company's exchange server, my PIN was a complex combination of letters and numbers (not a simple 4 digit pin). After the update, I am only seeing the number pad for entering my PIN number. I have no way of getting passed the lock screen. Anyone have any ideas on how to fix this?