How to change screen

@msdhoni32365 use the Samsung disassembly SM G360H Disassemble Assemble for this. Instead of using a heating chamber, you could use a hot plate or a good hairdryer. The temp to reach will stay the same. Then use something like this Anti-Clamp or similar to remove the LCD.

Replacement LCD's are readily available at many online stores. Just make sure you get the right one for your version of the phone.

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 the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.