Michael Prior
Analyst · Raymond James
All right. Thank you, Justin. Good morning, everybody. First, I'll just start out with a few comments overall in the quarter. Clearly, this was clearly a strong quarter, particularly in terms of growth and profitability and a really solid start to the year. The main drivers of the year-on-year increases were not unexpected, of course. One was the improved profitability of U.S. wireless due to the absence of transition costs and the result of some other cost improvement initiatives. And second, was the smaller but still nicely positive impact of the completion of the Bermuda merger. And we also saw improvement in a number of smaller areas like wireline. So again, really pretty much across the board. It was a very, very nice quarter.
Revenues did decline, of course, which was again, expected due to the attrition of the U.S. wireless subscribers during the transition and over the whole year last year. That factor will impact annual revenue comparisons for the next several quarters, given the expected difference in the average number of subscribers. But the focus this year has been and will continue to be on margin and profit improvement, alongside stabilizing the existing subscriber base.
So with that, let me get into some further operating details and I'll start, as usual, with U.S. wireless on the retail side. So last quarter, we spoke about our priority of stabilizing the U.S. subscriber base in 2012. I think the first quarter shows great progress towards that objective, down still, but a much smaller number. And to achieve that goal for the year as a whole, I think we need to increase our gross customer additions, while at the same time continuing to chip away at churn by, for example, bringing the number of voluntary customer disconnects down.
So on the gross addition side, going back to that, we had gross additions of nearly 55,000 and that's up from about 47,000 a year ago and in the fourth quarter. In fact, that is the largest gross addition number since the third quarter of 2010, which was the first full quarter after we closed this deal. And it was -- that was achieved, of course, off a much larger base.
Pre-paid gross adds were 32,372 and that's 62% higher than the first quarter of 2011. So obviously, it is prepaid side, which drove the -- primarily drove the improvement in subs, and post-paid gross adds were nearly -- were down -- sorry, the gross adds were 22,500, which is down both year-on-year and year end from the fourth quarter, and this is clearly where we still lag in the first quarter.
Now that we are through the transition, we are turning a lot of energy and creativity to sales and the team is working hard on ideas to increase post-paid sales. Among other things, we're digging down deeper in going town by town to see how we can boost distribution and share and get our value proposition across in each community. We believe it is a strong value proposition, but we have work to do in getting it out there in the market.
In the postpaid market, as most of you will know, it's typically a little harder to turn quickly than prepaid. A high percentage of the addressable market is under contract. So it may take a couple more quarters for those efforts to bear significant fruit. And moving back to the prepaid side for a moment, investors will have seen our joint announcement with U.S. Cellular about our U Prepaid brand coming into Wal-Mart. Working together, we think we've come up with a very attractive offer for our markets, capitalizing on Wal-Mart's drive to deliver all of the best local products. This is launching midway through the current quarter, and so we hope that will help increase volumes in what are often lackluster quarters in the industry for prepaid sales. We are proud of the leadership and creativity our team showed in securing this opportunity, really, really was a very nice achievement.
And with respect to customer churn. Postpaid and overall subscriber churn improved both year-on-year and on a consecutive quarter basis to 2.41% and 3.22%, respectively. A year ago, those numbers were 2.93% and 4.29%. So we've come a long way, but we -- none of us thinks we're okay to stop there. We still need to bring churn levels down. Subscriber ARPU also climbed for the quarter. It was -- it went from 48.56 in the prior quarter to 49.36 for this quarter. Although that was really due to some out-of-period ETC revenue pickup, and Justin will give a little bit more detail on that in his remarks. And furthermore, postpaid ARPU was down slightly at $54.15 compared to $54.43 in the past year.
On smartphone adoption, we ended the quarter with about 37% of our postpaid base on smartphones and 29% of total subscribers, and about 54% of total postpaid device sales. So that's both new customers and upgrades in the quarter were smartphones.
Onto wholesale U.S. wireless, roaming revenues' kind of in line with what you've seen throughout the industry. Voice volumes were down. Data volumes grew. We did have a minor expansion of areas covered, but it really -- the story was largely data volumes propping up further losses and even covering over into some cases. Looking forward, we don't have any significant area expansion plans in this area. So it will be -- it will be a challenge to grow this revenue from here, and it could contract.
Moving onto international operations. For international wireless, as I noted earlier, the main factor in the revenue increase was the impact of the Bermuda merger. And I'm pleased to say that we've completed all significant integration activity in the first quarter of this year, and that's less than 1 year after that transaction closed. Our team's primary focus in that market is now on looking for additional operating efficiencies while retaining our market share. Revenues in Guyana and in other international area were up slightly, driven mainly by growth in broadband and other wireline revenue, and that was offset by a slight decrease in wireless revenue, but total revenue for that market increased slightly over the year before.
So in summary, as I said, this was a good quarter, strong profit performance and the stabilization of our U.S. wireless subscriber base, a great start to the year. Our domestic prepaid business has been strengthened further by the Wal-Mart opportunity, and we will keep working on improving the postpaid side. So all in all, we were pleased with the results, and our focus now is on maintaining these gains and seeing where we can further improve on them.
So with that, I'll turn it back to Justin.