I'm not an expert of real carding, but at the beginning I done some experiment. So take my words as not exhaustive.
With 201 the Chip is mandatory, so you have to find POS with no chip option or, as you find, With chi reader not working.
I remember a trick: you can rewrite the dump on a card with chip and damage the chip. After 3 attempt the POS Will ask for the magnetic strip.
I think the best way is to find a friend that have a POS and try some experiment.
Good look.