G_Suraj_Shinde_NPNz , via OnePlus 8 , Sep 23, 2021 : OnePlus is giving free battery replacement of devices from OnePlus 3 to OnePlus 6T I have OnePlus 6 , i have submitted my phone day before yesterday . Today i got my phone with new battery but they totally ruined the back panel , my phone is of matte black colour , they just destroyed the beauty of the phone from the back . I want my OnePlus 6 back panel to be changed free of cost. And i want to complain about the service center,the quality of repair is worst . I have total of 4 devices OnePlus 3T , OnePlus 6 , OnePlus 6T and OnePlus 8 and i was referring OnePlus to all my friends because of quality and support . But my next phone will not be a OnePlus device . You guys have lost my trust. Just tell me how can i submit complain.