AT&T announced an additional 632,000 new customers including 398,000 tablet connections in the last quarter ending June 30.

AT&T, the largest mobile telephone service company in the United States, has announced an addition of 632,000 new customers with 398,000 connections for tablet postpaid plans. The tablet connections account for 72 percent of the total postpaid subscriber additions in the second quarter, setting a record for the second successive quarter with more than 300,000 tablet activations during Q1, GigaOm reports.

The Dallas-based telecommunications company added 551,000 wireless devices to its contract plans in the second quarter, marking the highest second quarter figure obtained in the last two years. However, AT&T did not report the number of iPhone activations in the quarter. But a report from newser.com states that the iPhone activations accounted for 80 percent of smartphones activated by AT&T. Not a surprising number for the company that introduced iPhone and held exclusive rights to sell the device in the U.S. for three years.

Despite such high activations on 3G/4G tablets, AT&T trails behind Verizon Wireless that announced 941,000 contract-based connections at the end of the second quarter, 221,000 more activations than its first quarter, the report adds.

AT&T earned $3.8 billion during the first quarter, a drop from $3.9 billion from last year's second quarter. But competitor Verizon Wireless had a significant increase in profits. It jumped 21 percent to reach $5.1 billion. Its total revenue went up by 4.3 percent from last year to $29.8 billion.  Compared to this, AT&T's revenue totaled $32.1 billion in Q2, up by 1.6 percent from a year ago.