The iPhone was originally meant to be a do-all device that can help you both communicate and accomplish multiple tasks easily and efficiently. However, for all of its features, it can be rendered useless with a simple freeze-up. By then, placing calls, reading emails, and completing other important tasks would be a drag.
What causes an iPhone to freeze up, anyway? There’s a myriad of possible explanations for this. Like a desktop computer, your iPhone requires up-to-date software for it to function properly, which means that the freeze-up maybe due to your iOS being outdated. It can also be due to faulty hardware (by then it would require the expertise of the likes of a Philadelphia cell phone repair specialist), or a corrupted program entirely.