I BUY BV7000 PRO ONE MONTHS THEN VIA ONLINE. CURRENTLY MY PHONE CAN NOT BE USED BECAUSE THERE IS NO DISPLAY ON THE SCREEN ONLY THERE ARE SOUND. WHERE SERVICE CENTER FOR THE LARGEST AREA IN INDONESIA?. I'VE BEEN CONFUSED AND DISAPPOINTED BECAUSE ITS PRODUCTS IS NOT DEFINITELY TECHNICAL SUPPORT. PLEASE HELP ME. EMAIL : bernand.naibaho@gmail.com

You could try to flash the firmware again over PC or ask the seller for an exchange.