Firmware infos :

 build date               : 2018年 05月 03日 星期四 17:04:26 CST
 build description        : full_k39tv1_64_bsp-user 8.1.0 O11019 1525338349 release-keys
 build id                 : O11019
 build display id         : ECHO_FEELING_V01
 mediatek platform        : MT6739
 product brand            : ECHO
 product device           : FEELING
 product manufacturer     : ECHO
 product model            : FEELING
 os version               : 8.1.0

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