1. Post iPhone model or cell phone model 2. Post how long you've owned the device. 3. Post call lifetime. iPhone users: Settings > General > Usage and scroll down to Call Lifetime. I'll start: iPhone 4 owned since Sept 27, 2010 and call lifetime is 3 days, 4 hours and 1.7 GB sent with 6.5 GB received Ever since facetime was released, I tend to use that now so that's a reason why my call lifetime may be low to some of you.