Husbands phone.

My SO broke his phone about a week ago maybe longer. It’s completely shattered and I my brother owns a repair shop and can fix it for feee. I told my SO I would take it to him and get I fixed. He gets all defensive and says no it’s fine I will just wait and we can go together. Hmmm okay. Well backstory a little... for the past little while I keep asking him why is your phone always on silent? He responds I just like it that way. But it’s only on silent when he gets home because I have heard it in his truck loud as hell. He will never pull his phone out in the house he spends hours in the garage watching YouTube on it. It’s just weird. Anyway I asked him again today why won’t you just let me go take your phone in. He says well we can go tomorrow and get it fixed I’ll just go with you. Okay... what’s he hiding on there? Why is he so afraid. Does he realize I will find out one way or another because my brother will tell me what he finds I’m not a damn idiot. Do I ask him to let me go through his phone? Do I just do it anyway? He was caught watching porn on my business phone but that was discussed.i just have this gut feeling that he is hiding something and that he doesn’t want me to find it because he wasn’t able to delete it before his phone broke. Ugh any advice on what I should do?

Update.. so we went to the hospital to get my injection (makena shot) and then went to my brothers. He stayed in the car while my 2 year old was asleep and I took it in. I told my brother to see if he could find anything on it after he got done and to the testing part. He asked me what he was looking for and I told him anything that is drug related, or another girl anything I said you know what your looking for. He gave me the nod and began. Few min later my SO walked in with my daughter. My brother and I wwre just talking nothing unusual. And he’s talking to other people. My nephew also works there so I was trying to cheer him up. Well he gets the screen on and its disabled. NOTHING works. He can’t remember his passwords to his iCloud or anything. Seriously made me so upset. So the phone was then reset to factory setting and he got away with whatever it is that was on it. Ugh. So annoying and frustrating. I had a talk with him on the way down there telling him he needs to step it up. I am in preterm labor and can’t deal with the stress that he has put on me any longer. He told me he was going to be home more and help with the kids more. So we will see. I hate saying this but if I were to hold my breath for it I’d be dead.