Call Record & Clear Recent Apps

Please help me , very thanks …

1 . how can i record while calling ?

my before meizu mx5 , every rom is ok

but my now Pro 6 , G , this funtion not work

i see the key " record button " while calling, but can’t tick it . it dim

here example:

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Rec button dim, can’t not turn on , or touch

2. Clearing Recent Apps

+ now ( Pro 6 ):

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it’s so inconvenience , take 3 - 4 seconds to close all apps , and to swich another apps is so waste time, too long

+ before ( Mx5 ) :

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very quickly close all , by scroll down, it takes less than 1 seconds , also switch another apps , wonderfull

how can i come back recent apps manager as MX5 ?

There are many spyware applications that are able to record calls

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