Right on the heels of Verizon announcing its Q4 2010 numbers, AT&T has done the same this morning. The carrier posted a whopping $31.4 billion in revenue in the fourth quarter, up $653 million from the same time in 2009. During Q4, AT&T also managed to add 2.8 million new subscribers, bringing them up to 95.5 million total, which makes AT&T the largest carrier in the land (for now). Churn reached a record-low for Q4 at 1.32 percent. One more interesting note: there were 4.1 million iPhones activated on AT&T in the final three months of 2010, alongside 442,000 tablet devices.

AT&T certainly managed to post some impressive numbers for Q4 2010, although many were disappointed with the number of tablet activations that the carrier earned. Just as with Verizon, it'll be interesting to pay attention to ATT's financial reports over the next quarter or two and see what effect, if any, the Verizon iPhone has on their numbers. On one hand, it could certainly eat away a bit at their subscriber base and number of new activations. Then again, though, the fact that ATT is getting some other hot, new devices to make up for their lack of iPhone exclusivity could balance things out. How do you all think AT&T will fare going forward?

Via AT&T (PDF)