Please use the support website to locate a phone service near your location. To find the location follow these instructions: Smart Phones > A57 > Tamil Nadu > Trichy. Once you select the city you'll see the contact info. Since there is no information related to firmware update, you will need to use their service center.
M/S SRI BALAJI ELECTRONICS
DOOR NO. C-95, FORT STATION ROAD 5TH CROSS, (NEAR KAP VISHWANATHAN HIGH SCHOOL) THILLAI NAGAR MAIN ROAD, TRICHY - 620018
Mobile No. :9362133338 Email : email@example.com