Have you ever watched someone else using a cell phone? Was their posture good or poor? Most likely it was quite poor. When we get focused on a phone or tablet, we tend to want to create some “private space.” To do that, we pull our heads and necks forward and curl our upper body into a ball to get that private feeling. If someone is talking on the phone, they may also be hunching their shoulder up to cradle the phone next to their ear.