how to check to see if iPhone is hacked

Take a look at this article If you think your Apple ID has been compromised - Apple Support

gabyrubio15 wrote:

My phone has been hacked

Very unlikely. Someone could have gotten into your Apple ID on the Apple servers, but not into your iPhone itself, unless you are someone that "Jailbreaks" your iPhone, and even then it is mostly theory that a jailbroken iPhone can get hacked.

If your Apple ID has been hacked, change your password, and change your security questions. When choosing Security Questions, you do NOT have to give answers that match the questions. For example: Q: "your first pet" A: "pickup truck". And make sure you store your security questions in someplace safe so you can accurately give them back.

That helps me if my Apple ID has been compromised. The question was about a device being hacked. I am having this same issue. My Apple ID hasn't been hacked but my phone is making mystery calls on its own and then deleting the history.

sallie33 wrote:

I think my phone has been hacked how do I find out if it has and who has done it please

Very unlikely. But your Apple ID might have been compromised. See my reply just above your post.

My phone has been hacked

I think my phone has been hacked how do I find out if it has and who has done it please