To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
It's very basic which is okay. But once I bought a memory card it wouldn't click into the space instead it pushed the entire screen down. Now I cant turn it on or off because the power button fell down with the screen.