Bottom right screen touch not working

@was27948 since your touch screen does now work on a specific area, it is conceivable that your touch-panel has failed. You will need to replace the complete display assembly for this. since iFixit does not yet have a specific guide for this, use the one from here It was written in Spanish so use a browser that can translate it for you, if needed. The display assembly is available at many online places.

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!