Are you a phone cradler using your shoulder?
Gotcha! Your hands are busy doing something like typing on the PC or writing something that you just have to multitask and hold your phone while on a call using your – yes, your shoulder. I know, right? Well, that is just so wrong. No wonder you are experiencing stiff neck. Why would you trust your shoulder with the phone, seriously?
When you need to use your phone for a call, stop what you are doing and hold it up to your ear with your hand. HAND. That’s the only way to do it. Enough discussion on this topic, though. No need to explain further.