My pet Mitred Conure (Leonard) loves to mess with my iPad while I'm reading. On the other had, Leonard >hates< my iPhone. If he's on my shoulder he'll engage in a agressive display waving around and violently biting my shirt. If the phone is close enough to him he will attack the phone. I'm an extremely light phone user so its not like I ignore him when using the phone, but I do expect it is the size makes it competition for his bonding with me.