Firmware infos :

build date                 : Thu Jan  8 18:53:39 CST 2015
build description          : tianyu72_w_hz_kk-user 4.4.2 KOT49H eng.ccadmin.1420714238 release-keys
build id                   : KOT49H
build display id           : TBW973615_9570_V06044
custom build version       : TBW973615_9570_V06044
mediatek platform          : MT6572
mediatek version release   : ALPS.KK1.MP7.V1
product brand              : alps
product device             : tianyu72_w_hz_kk
product manufacturer       : MTK
product model              : A420
os version                 : 4.4.2

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