Firmware infos:

 build date : Mon Aug 27 11:39:24 CST 2018
 build id : NRD90M
 build display id : NRD90M release-keys
 redstone version : LEAGOO_Z7_OS3.0 Lite_E_20180827
 platform : SP9832A
 product brand : LEAGOO
 product device : Z7
 product manufacturer : LEAGOO
 product model : Z7 
 os version : 7.0

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