It is the youngest of the five United States service academies, having graduated its first class in 1959. Graduates of the Academy's four-year program receive a Bachelor of Science degree, and most are commissioned as second lieutenants in the Regular United States Air Force.
The SIM tray is located on the right side of the iPhone 4. Like the rest of the iPhones, there is a small hole used to release the SIM tray. A paper clip is the tool of choice. Place the paper clip in the hole a press in firmly. Make sure the paper clip fits in the hole.
Use. The SIM card is provided with your iPhone (or 3G iPad) by your carrier and it is used to store data about your account. It holds information such as your phone number, security data, billing information and things which help the carrier to know who is the user of the phone.On older devices, especially feature phones, it also stored things like text messages and contacts). The SIM card allows you to change cellular phones and keep the same user data. The SIM card is what lets your carrier know that you're the account holder of the iPhone using it.