Hai, I have purchased a new i phone 5c. I have updated the iphone OS and installed some apps in that. But the time in the phone is not set. Like when ever i set the time and lock my mobile, it remains at the time what i set. eg. if i set to 1.20 pm and lock my mobile it will remain in 1.20 pm even after 1 hr. if i use the mobile the time is changing. but when the mobile is locked the time is not changing. I have changed time manual and automatic even I reset the phone to factory settings and checked still the problem is there. Could any one suggest the reason for this. Is is because of update or apps installed or becasue of defect in phone. Thank you.