Xiaomi redmi note 9 pro 64 gb 4 gb ram July 8, 2019 16 32 64 128 Redmi 9 64gb 4gb ram Redmi note 9 pro 6gb 128gb Redmi note 9 pro max 6 64 Redmi note 9 ram 4+1 Redmi note 9 pro ram 8/128