Tell HN: AT&T disabled phone numbers and accounts of users using the old phones

AT&T disabled users phone numbers and account for using SIM in the phones not on the whitelist. https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf

https://forums.att.com/conversations/wireless-account/my-att-prepaid-account-disconnected-today-but-i-just-added-money-this-sunday/6271d8e6ee9f260c2628029a