My.New.iPhone：52.Simple.Projects.To.Get.You.Started(No.Starch.20...

Turning an iPhone on and off should be easy— and it is. However, the iPhone can be in one of four states: on, off, sleep, or airplane mode. If all of this sounds more confusing than just turn- ing your iPhone on and off, relax. There are actually valid reasons for putting your iPhone into different states. The trick is learning the advantages of each state and how best to put your iPhone into each state.