For example, next time you want to travel abroad but don’t want to entertain the idea of international data and calling plans, just leave your sim card at home and you’re good to go.
Alternatively, buying a new iPhone completely solves the problem. So, how to use iPhone without sim card? The great news is – it can be done! Even better, you can fix this yourself if you have an older phone. Keep in mind that if you try this, it voids the phone’s warranty because you’re tampering with iPhone’s internal software.
As you probably gathered, this is very much a last resort and should only be used on old iPhones that are locked by carriers. You might have heard of the term “jailbreaking your phone”.