I am planning on making a cell phone design for a tshirt design, and wanted to make a design that resembled the iPhone. Now, I am not going to take a picture off the apple website, and print it to a shirt. I plan on making a vector style design in the shape of the iPhone.
It’ll be a fine line- Apple surely would claim there’s certain aspects of the iPhone design that are proprietary. Trying to prove copyright of a rectangular piece of black with a round button might be difficult to do though.
It’s probably not blatant infringement meaning unless your tshirt goes ultra viral, you’re not likely to peak the interests of anyone’s lawyers.
If you draw an identical copy of the iPhone, yes, it’s illegal. Apple has a design patent for the iPhone. Reproducing that design is illegal. Reproducing it for profit (e.g. selling t-shirts with an iphone design on them) could mean you coughing up a lot of money to Apple (probably more than you profit from the sale of your t-shirts).