I bought samsung A51 before one month and i have shown there is dust inside one camara without any damage of phon. Other 3 camara is clean but dust is raising on one camara. I complain to customer service center and they told me that we dont find any fault nd we are also amaized that how this dust is coming inside. I want replacement of this phon thought service eng. Said it can be happen again User's recommendation: I have faced very bad experience about samsung phon though this is my 4 th samsung phon please think twice before buying.