you are still lucky i have posted a thread right now here ....... i got 12 hour battery light with screen on time is 3 hour lol and your is 14 hour with 7 hour screen time that is cool in my case .........
Where are you getting this 31.4 hours from? And on most android phones (from what I've seen anyways) getting 5+ hours of screen on is considered really good, so your 7 hours is extraordinary
" IN-STORE PICKUP CHECK AVAILABILITY
Smartphone Monthly Line Access on MORE Everything Plans: $40
* Multi Window does not support all applications.
**Battery performance depends on network configuration, signal strength, operating temperature, features selected, and voice, data, and other application usage patterns. "
Verizon doesn't consider 15 hrs screen on time out of 31 hours total to be typical mixed usage. Reduce the screen on time to 4 or 5 hours over 31.4 hours total and you should be able to meet the 31.4 hours