you can't use the $20 or $10 coupon on the evo.
you also can't use both coupons together!
I used the $20 one for a car charger and screen protector (I didn't pay attention when I got the screen protector but it's 5 universal ones
, it was only $7 though).
after a car charger, screen protector, the evo, and all the fees I walked out paying $170.
good luck!!