Download Android stock firmware for T-R42 TV Box from here or from here. Download previous version from here.
Archive name: B351_juebao_2014_11_11
Archive file size: 291 MB
Image file name: B351_juebao_2014_11_11.img
Platform: RK3188
Boot version: 2.16
FW version: 4.4.02
ADS HERE !!!