The rear camera module on your Xiaomi Redmi 9C is perfectly safe with this tempered glass protective lens.
(3 Pack) Beukei for Xiaomi Redmi 9/Redmi 9T/Redmi 9A/Redmi 9C/ Redmi 9 Prime Screen Protector Tempered Glass,(6.53 inch),Full Screen Coverage, Anti Scratch, Bubble Free
Screen Protector Xiaomi Redmi 9c Full Screen - 4-in-1 Xiaomi Redmi 9c Glass - Aliexpress
(3 Pack) Beukei for Xiaomi Redmi 9/Redmi 9T/Redmi 9A/Redmi 9C/ Redmi 9 Prime Screen Protector Tempered Glass,(6.53 inch),Full Screen Coverage, Anti Scratch, Bubble Free
Xiaomi Redmi 9C Tempered Glass Screen Protector Premium High Quality Polish Glass For Redmi 9C
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Xiaomi Redmi 9C Case Coloured The aves - Dealy
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Screen Protector Xiaomi Redmi 9c Full Screen - 4-in-1 Xiaomi Redmi 9c Glass - Aliexpress