Call Time: Current Period vs Lifetime

Hey there RenfroSams,

Thanks for reaching out to Apple Support Communities. We understand you have some questions about your cellular settings. We’ll be happy to help with this.

Call Time Current Period is the total time on phone calls for the current period. If you look under Reset Statistics, you can see the current period. When you reset it, the Current Period should drop to zero. 

Lifetime shows the entire time of calls taken since your iPhone was last set up. Lifetime will go back to zero if you restore your iPhone to factory settings, so this doesn’t necessarily mean since the phone was first used but last set up. You can read more about your cellular settings here:

View or change cellular settings on iPhone

Cheers.