There are several ways to track a cell phone, some more effective than others. Conventionally, you’d need to get hold of your wife's smartphone when she steps out leaving his phone behind. However, this method not may be challenging because virtually everyone is in possession of their smartphone 100% of the time.

If you want to track your husband's cell phone without him knowing, a program like mac keylogger https://www.refog.com/mac-keylogger.html is the way to go.

Not only can you monitor your husband remotely. But this program grant you access to virtually everything she does on his mobile device.