Ive had my Droid 3 for almost three months. On several occasions when I am using the phone, the display has not come back on when I take it away from my ear so that I can see the buttons (ie to hang up or to enter my password for voicemail, etc)
The phone is working during this time, I can hear clearly everything on the other end, but nothing I do turns the display back on. My screen/phone is kept clean so there is nothing obstructing what I assume is the light sensor on the front that controls the screen dimming.
Anyone else have this problem or have any suggestions?