Android 5.1.1 apps to 6.0.1 ?

Hey there 😀 . I wanna ask . is there a way to port any of android 5.1.1 apps to marshmallow ? . I'm talking about system apps . because I have a problem with marshmallows phone provider app😣 . so I wanna port the lollipops one . could you help me please ?😏

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