Firmware infos:

build date : Wed Mar 22 20:55:43 CST 2017
build id : LMY47I
build display id : Q7_80L_WEG_3GW_B15_EMMC_32_4_QHD_DDR2_DCHS_350_A_J26_20170323.205543
Mediatek Version Release : ALPS.L1.MP6.V2_YUANDA6580.WEG.L_P2
platform : MT6580
product brand : DCHS
product device : DCHS
product manufacturer : DCHS
product model : J2
os version : 6.1 

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