So he's clearly hiding something

So he is usually weird about his phone.. he usually takes it everywhere. He claims it's because he has lost other phones and doesn't want to lose this one... Well the other day every time i looked away he would start texting. Then I went to go to the store and it happened again.. his phone was hidden and as soon as I turned he started texting.. I looked back and saw it...

Then today he went to take a shower, he literally took his charger into the bathroom with him... like seriously you have to hide something that bad you take your charger in the bathroom???

What do I do??