Grey Patch on screen, irresponsive

@tarangtambe you will have to change the display assembly since the touchscreen is"sandwiched" in that assembly and since you have a grey strip on the screen. That usually comes from a bad display. Since iFixit does not yet have a guide for this, use the guide from here It is written in Spanish so use a browser that does the translation for you. Replacement screens are readily available at many online stores.

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!