Can two iPhones be linked together without one person knowing?

If he won't believe you, then you have worse problems than an iPhone issue.

You can't prove a negative. You can't prove that you didn't do it if it never happened. If you had his Apple ID, his email passcodes and had unsupervised physical access to his phone, you could do a lot. If you do know those, there's really no way to prove that you didn't use them to do what he thinks you did. If you don't know that information, how do you prove you don't know it? You can't.

This is, unfortunately, not a technical problem. But, for what it's worth, there's no way to link two iPhones by BT in such a way that you know what the other one is doing. I have know idea what he's talking about when he says his phone is being "hosted". "Hosting" is what you do with websites or exchange students. It has nothing to do with phones. Where technology is concerned, you're boyfriend's clueless, but, telling him that isn't really going to help, either.

I understand you're upset at being accused of something you didn't do. It must be extremely frustrating. You didn't ask but, in my opinion, any man who accuses you of spying on him, who thinks it's okay to go through your phone looking for evidence, is not a man you should be planning on spending much time with in the future.

I think he's using that as an excuse to look through your phone, but I have no idea!

If he's confident that his phone is being "hosted" have him restore his phone to factory settings, and not from a backup, to fully ensure that there's nothing tying your phone to his.

TCaswell wrote:

I Have nothing to hide from him, so thats not the issue...`

The issue is that he doesn't trust you. Until that's resolved, it won't matter what you tell him, what technical explanation you give him. He won't believe you.

And you should turn on Find My iPhone.

As the Roaminggnome says you have far more serious problems then the iPhone issues. It sounds like your boyfriend need to do some serious growing up to do and fast.