Phillips seems like a nice enough guy, but I think this interview tells us everything about his overall mentality.
If you're not getting into the team, you can respond one of two ways - you can fight or you can give up (and in some cases sulk). It seems like he gave up. I'd have been busting a gut to make sure my weight was good, I was training hard and doing everything to try and get into the team. Surely its common sense to come back to training early if you've barely played for England or City? You shouldn't need Pep or anyone else to tell you that, especially when you're trying to impress him.