Went shopping again and wanted to come back and tell you the terminal had 4 green lights at the top when it took the payment.Did they use Verifone MX915 (http://www.verifone.com/media/413260/MX915_1_lg.jpg) or Ingenico ISC250 (https://www.poshighway.com/assets/images/ingenico_isc250_1.jpg) for customer facing equipment? The latter has a hardware green light that lights up once NFC is ready to be used. I think some Autozones may use MX915's while others use iSC250's.