Sony India — sony mobile z1

Address:

Udupi, Karnataka

I perchesed sony z1moBile but its not working properly . once its replaced but now agin problem with GPRs and aplication .i give it for service to sony serviCe udupi.they told me to exchange the mobile we give 50% cash back to that u perchace new Z1 but i want reapir or give me onther new one .please help me to salow the problem z1 i give for service more than 5 time please give replace the new one thank you