Karbonn Mobiles — Not Functioning properly

Address: Varanasi, Uttar Pradesh

My karbonn mobile model no k11 which is in warranty period is not properly attended by their service centre at Varanasi even after giving them 2 times the service centre every time assures that your mobile is repaired and will be in good working condition but out going voice is not heard and network disappears frequently.
Model - Karbonn K11
IMEI No.-1:[protected]
IMEI No.-2:[protected]
Color-Silver
REf No.[protected]
Please arrange to repair / replace immediately the concerned product.
B.P Singh
Mob No.-[protected]
453/A,DLW Colony,DLW, Varanasi
e-mail: [protected]@gmail.com