Unless he wears skintight Wrangler nutcutters he won't have any problems with pocket space. I'm a girl & I wear semi-tight jeans & I even carry it in my pocket sometimes with no issues. Just don't carry anything hard(keys, change, tools) in the same pocket.
I also would NOT get him a TP1. It's a good phone but it has serious build quality issues. I went through 3 of them & I baby my phones like you wouldn't believe.
That said, DAMN what a lucky kid! Wish my folks would have bought me a $600 present when I was 18, but I get bath stuff for my birthday & Xmas. But then again my mom did get me one of them newfangled 'cellular telephones' from SWBell when I was 18 back in the stone ages, so I guess maybe I am loved, lol
