I did a search and could not find a reference to this, however my search terms may have been wrong. While I am on a call, my phones goes into sleep mode. I am still on the call but the phone will not respond. I tap the screen and nothing happens. I hit the wake up hard button and it wakes up but then hangs up. This is a real issue for me as I often make calls where I have to input numbers to navigate a menu system or put in ticket numbers etc... Anyone else have this issue and is there a fix for it? My phone is set to sleep after 2 minutes but on a call it will go to sleep after 15 seconds or so. H.