Please take time to read my problem and help me 
Hey Guys, My Xperia Play is new and no root has been performed. Sometimes when a usb chord is plugged or the earphones, the screen acts weird when i touch it. I think its registering multitouches on the phone. When i swipe my fingers, it goes all around the screen. I cant even unlock it properly. But when i remove the chords, it goes back to normal. Sometimes it also happens when the phone is lying down without me holding it, and then i try to swipe. I've already returned the phone and was replaced by a new one, but when i tried it at home, it still the same. Already upgraded as well to 2.3.4. Is this a hardware problem or is it normal for this phone? please do help..

Hey Guys, My Xperia Play is new and no root has been performed. Sometimes when a usb chord is plugged or the earphones, the screen acts weird when i touch it. I think its registering multitouches on the phone. When i swipe my fingers, it goes all around the screen. I cant even unlock it properly. But when i remove the chords, it goes back to normal. Sometimes it also happens when the phone is lying down without me holding it, and then i try to swipe. I've already returned the phone and was replaced by a new one, but when i tried it at home, it still the same. Already upgraded as well to 2.3.4. Is this a hardware problem or is it normal for this phone? please do help..