I purchased karbonn titanium s5 in 2015. I used this phone everthing was going to good but it was not giving me good battey backup. When I used to browse internet in the phone. Battery used to completely die. It did not used to give me good battery backup but apart from this problem all thing was good in this phone. Just because of battery issue I was not able to use my device as I wanted to use it. Karbonn phones do not have good battery back up.