said by whfsdude:With NAT in use apps have to punch holes through NAT and it's been shown that apps having to do so every 30 secs to a minute has quite an impact on battery life. Eliminating the requirement to punch holes in NAT will increase battery life time. said by anon user20 :
But why is that ( Who says that mobile users must have a public IP on their mobile system )
A couple of reasons just off the top of my head.