My sister\'s boyfriend said he would wear this on a shirt so I am hoping other people would too. Besides landline phones are so ancient I am not sure how to work one anymore, hence the title.

its a good style..

very interesting

I'm not sure about the design but I really love the simple line-drawn style.

Perhaps I should get rid of the green phone? I admit the geometry is hard to interpret.

Only thing I could add to help would be watch your shading. It seems some of it is off, especially on the purple receiver for the green phone but it may be the twist to the hand-drawn style. But yeah, main recommendation is to watch the shading. Otherwise, it's a pretty neat illustration.