It's not necessary to be great experts to notice the low-quality plastic, the bad printing, and the brown magnetic stripe on back, which is even crooked. Examining the magstripe with a magnetic viewer, it's easy to see a fake magnetization, not encoded at all for a telephonic use.
Several different images have been printed on main face (like the example at right), but the back with the magstripe is usually the same, so any card that have a back like the one we show here, is for sure a fake one.