Our network switching logging will be extremely useful to show you how often you switch between Sprint and T-Mobile networks. It will show you the time that the network changed and what it changed to, whether WiFi was connected or disconnected, mobile networks switched, or if you went into airplane mode.

If you want to have more details, including the signal strength, location of the change, and technology changes (LTE/3G/2G), consider upgrading to Pro! See an example here.