How to change fingerprint in this phone

@adityagotawala I would suggest that you replace the fingerprint sensor. Of course, make sure that your case is not to bend and that the new sensor will still fit into the case.

Since iFixit does not yet have a specific guide for this repair, use the guide from here It is written in Spanish; use a browser that will do the translating for you, if needed.

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!