Sir I have got a notification for wireless update in my machfive phone, should I download it and what I will do after download that.?
I wouldn't update yet. Look for forums or Facebook Group of people using Karbonn Titanium Mach Five. Check if anyone did the update and check if any of them experience any issues. Cause in my experience, I have this phone where an update came. I didn't update immediately, later I learned it's a buggy update that makes your phone restart a lot. Hope that helps!