7. “Can I see just your call history from yesterday?”
You could also ask him by specifying the time period, such as “just the ones from yesterday.” Even if he wouldn’t want you to look through his phone from A to Z, he might say, “Fine, you can see just the ones from yesterday.” This would be effective if your boyfriend hesitates at first but eventually gives in when you start out asking for a small favor. However, this is only useful if you know when the suspicious behavior took place. It’s best to ask him right after something catches your attention, so that you don’t miss the opportunity.