I am certain this got resolved by now. This is an answer to an old question because the “split in half” still comes up with other phones as well. Commonly after a drop of the phone or other “traumatic injuries,”, this is attributed to a cracked screen. The only repair for this is a replacement of the display. Most modern smart phones have a fused digitizer. So in cases where only half the touchscreen works the requirement will be the same; replace the screen. [guide|88880]