How to change home key default app on the Lenovo A536?

Why my default home push is google

I wanna to my phone complaint My phone first time give in the home button menu s, Then after do my phone reset Then dont have not home menus Iphone model set in this my phone Please help me

Go to Settings > Apps > search for the app that opens when you press home, once you find it, tap it and Clear defaults.

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