Mobile phones and computers might look the same to some people, and logos, labels or names may not always be visible. But most electronics are trademarked and although they might seem generic, they all have some specific details that make the manufacturer identifiable. You should therefore always do you research beforehand.
Any photos showing a trademarked element like a mobile phone, computer, tablet, iPad etc must be marked editorial is the brand name/logo is visible – this includes any specific design details which set an item apart from others like it too, e.g. the round home button on an iPhone.
Images/footage of mobile phones, computers, tablets, iPads can be used as royalty-free material if the brand name/logo and visible design details are hidden.