Download Android Lollipop 5.1.1 firmware for R-Box Plus
This firmware is for R-Box Plus with Rockchip RK3229 CPU
Download Android Lollipop 5.1.1 firmware for R-Box Plus from here or here.
Download Rockchip Driver Assistant v4.4 from here and download Rockchip Batch Tool v1.8 from here.
Firmware details
Archive: R-BOX Plus 5.1.1 20160808 fw
Model: R-Box Plus
Image file size: 1.19 GB
Platform: Rockchip RK3229 / RK322A
Image name: tf update.zip & update-rk3229_5.1-R_BOX_PLUS-ota_v0-20160628.img
Model number: rk322x_box-userdebug 5.1.1 LMY49F eng.edwin.20160628.233442 test-keys
FW version: 5.0.00
Boot version: 2.31
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.