It is possible that the card you’re accepting is not contactless. You should double-check this before proceeding to accept a payment. Simply find the contactless sign on the card and, if it’s visible, you’ll be able to accept the card with your myPOS Glass app. Also ensure that the card you’re accepting is a Visa or Mastercard card.
Be sure that the client's card is always held against the back of your phone so that it is properly read. The card should be withdrawn from the back of the phone only once the dots on your screen have completely loaded and once a sound signal confirming the successful payment is heard.