Ron bought a Samsung Galaxy Note IV from T-Mobile and he's having issues with the hardware. They offered him a refurbished replacement. Leo says that Ron should be able to get a new one under warranty and he should stick to his guns and demand it. That being said, refurbished isn't bad.
If he wants to get a new phone, the Galaxy Note V should be out this fall. The Samsung Galaxy S6 Edge is what Leo uses, but he's not sure he recommends it because the touch screen is a little unpredictable. It does have a great camera, though. The iPhone 6 has better battery life. The Nexus 6 is still a good option as well.