Hi I have used this phone for 6 months There is lot of problme in Karbonn Tinatimum we are not able to copy full contact list, some times contact not able to view. not able to copy files from phone to computer. Really it is very bad phone.every time I start it it shows android is starting and optimizing apps and then start the same process again all karbonn phones battery back is very low.even karbon service centres employee also not recommending to purchase this companys phone.never buy this phone