Under FCC rules, if you are on a plan where the ACP discount covers your monthly fee, you must use your Metro by T-Mobile service at least once every 45 days to keep your account active. If no activity is registered on your account after 30 days, you will enter a 15-day cure period before you are de-enrolled from the Affordable Connectivity Program and the discount is removed from your account. To maintain the Affordable Connectivity Program discount, simply place or receive a call, send a text, or use your mobile data (off a Wi-Fi network) each month.