my phone was not worked for last two days it happen after the instalation of new os,this is happen one of my friiends also plssssss find some solution

We are all just phone users here, and no-one can hope to provide any advice with so little information to go on as to what exactly has happened. You need to provide some detail.

If you don't tell us exactly what the problem is, we can't even begin to guess what's wrong. Are you getting an error message? What EXACTLY does it say?