Download Android 4.2.2. KitKat firmware version 140508 for Elephone TV Box from here, here or here. Download Android 4.2.2. KitKat firmware version 140319 for Elephone TV Box from here, here or here. Download perfect stock firmware from here. Download Rockchip Driver Assistant v4.8 from here and download Rockchip Batch Tool v1.8 from here.
Archive name: K2_RK3188_Public_V442_140508 / K2_RK3188_Public_V422_140319
Image file name: update.img / update.img
Firmware size: 238MB / 290MB
Model: Elephone TV Box / X88 / i9R TV Box
Platform: Rockchip RK3188 / RK31
Firmware: Android KitKat 4.4.2 stock
Model number: rk3188
FW version: 4.2.02 / 4.2.02
Boot number: 1.24 / 2.10
SDK version: RK30_ANDROID$(PLATFORM_VERSION)-SDK-v1.00.00 \
Build number: K2_RK3188_Public_V422_140319 – rk31sdk-eng 4.2.2 JDQ39 eng.gouwa.20140317.151325 test-keys / K2_RK3188_Public_V442_140508 – rk3188-eng 4.4.2 KOT49H eng.gouwa.20140508.095745 test-keys
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.