official rom of y336 u02 using UpgradeDownload

the users of this phone faced a lot of problems like hanging up in a logo screen , stuck  at the opening
logo , to put an end to that problem try hard reset your phone and this doen't worked for all users .

now let's try installing the official ROM of the device  ;

first one :-

there are two ways to  install the official Rom by using the sd card , and this way is easy to be done 

 second one :-

using a program called upgrade download in the files 

 i have made a video about that way .

the files needed

1- firmware file download Y336-U02V100R001C328B106

2-drivers 

3-upgrade download program

how to download these files :-

for the steps please watch that video