KEY TAKEAWAYSShares of AT&T (T) dropped more than 10% on April 20, 2023, after the company reported underwhelming subscriber and revenue numbers.The company has been focused on growing mobile phone subscribers since its sale of DirecTV in 2021.Shares of competitors Verizon (VZ) and T-Mobile (TMUS) also moved lower. $AT&T Inc(T)$ shares fell 10.41%, in the biggest one-day decline since July 2002, after the telecom giant reported weak subscriber growth and its revenue missed targets. In its 2023 first quarter earnings report, the company said that it added 424,000 postpaid phone plans, representing the amount of consumers that pay their bills at the end of each month. While that was better than analyst projections, it was below the 691,000