I recently noticed that my touchscreen will randomly stop working right. I thought maybe it was due to it getting to hot. Soon after I noticed two white lines running down the middle of my phone vertically. The touchscreen will not work in the middle and it only works where the lines are not. I recently lost my original phone and had to have it replaced. I have yet to drop the phone or cause any damage. I hope they did not send me a refurbished phone. Is anyone having the same problem?
If you had it replaced under warranty you were probably sent a refurbished one. Contact whoever you received the replacement from (Asurion, Apple...) and let them know what's going on.