My phone is affected by ghost touch

@obetyglain Ghost Touch will definitely be coming form the display assembly. So "could" be the white line you are referring too. That however, can also come form the display connector or even the main bord. At this time, start off by replacing the display assembly and then re-evaluate.

Since iFixit does not yet have a specific guide for this, use something like this video to do the replacement.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!