DL manuals LAZER Cell Phone MW6617 Service Manual LAZER MW6617 Service Manual - page 18 123456789101112131415161718192021 Page of 21 Go Download Print this page Bookmark us 6.. Then change " Download Only" mode to " Firmware upgrade! ! ! " 7. Then click "download" and then connect mobile and pc by usb cable(make sure the tablet is turn off mode), then the upgrade will be start. « ‹ Prev15161718192021Next › »