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.
I like to be a lot of sim card tray to help it saving my money. I don't lose those a one sim card tray if have lost it somewhere. That's doesn't easy. If you have a lot with the sim card tray would be better to keep your key with iPhone won't lose it at home. If happened lost a tray sim card somewhere like in a car, apartment, house, or beach that you don't buy waste. Keep tray on it better to keep in your hand with pants.