I am facing this problem from fist day to till now I purchased Karbon titanium s202 from bhawargarh, baran, rajasthan, in 18 July 2015, I have already send this mobile two times in service center but problem as is it till now, problem is whenever I use internet this phone goes in sleep mode automatically, sometimes this phone does not synch all contact on what's up and some time show full network on mobile but call does not come on set and it shows switch off. Was this information helpful? | 
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