To keep AT&T wireless and AT&T PREPAID customers affected by the recent tornadoes in Missouri connected during this difficult time, we’re providing unlimited talk, text and data access. This offer is for customers based in 10 specific zip codes, and runs from May 23, 2019 through May 27, 2019.
To make this possible we’re automatically issuing credits and waiving additional service charges for AT&T wireless customers with billing addresses and AT&T PREPAID customers with phone numbers in 10 zip codes* at this time.1
Customers in these areas may still receive alerts during these dates, but accounts will reflect the credits and/or waived data, voice and text charges.
Source: https://about.att.com/newsroom/2019/missouri_tornado.html