Steven Campbell
Analyst · Morgan Stanley
Thank you, Mary, and good morning everyone. At a high level U.S. Cellular's results reflect positive growth in revenues quarter-over-quarter as we improved ARPU. Operating cash flows declined primarily due to increased handset subsidies and higher system operations costs for data growth.
Customer results were mixed, as we improved retail gross additions, but as Mary said, still challenged with retaining customers in the extremely competitive marketplace, and the somewhat still sluggish economy. Prepaid gross and net customer additions improved significantly as a result of our introduction of U Prepaid in over 400 Wal-Mart stores.
As shown on Slide 11, second quarter retail gross additions were 277,000, up 23% from 226,000 in the prior year quarter. In the Postpaid segment, there was a net loss of 48,000 customers, as the 9% increase in postpaid gross additions was offset by an increase in churn. In the Prepaid segment, we did much better than a year ago adding 20,000 customers. In total, we lost 28,000 net retail customers in the second quarter this year compared to a much larger net loss of 58,000 last year.
Postpaid churn, shown on the next slide, increased to 1.57% from 1.38% last year and remained stable from the level in the first quarter. As Mary commented earlier, we attribute this increase to the expanded distribution of the iPhone and aggressive promotions by our competitors, particularly for LTE devices and services. Additionally, we continue to see some migration from postpaid to prepaid offerings.
We continue to add customers to our Belief Plans, 238,000 during the second quarter. So we currently have 3.6 million customers or 68% of our postpaid base on our Belief Plans.
Slide 13 shows the trends in smartphone sales penetration and Postpaid ARPU. During the second quarter we saw 410,000 smartphones, which represented 52% of total devices sold. This compares to the second quarter of last year when we sold 308,000 smartphones or 40% of the total units sold. 68,000 or 17% of the smartphones sold this quarter were 4G LTE devices. Smartphones now represent 37% of our postpaid subscriber base compared to 23% for the same period last year.
While the overall cost to subsidize smartphones especially the 4G devices is greater, we expect that the higher ARPU and migration of data usage off our 3G network onto our 4G LTE network will benefit our results over time. And as you can see on the graph at the far right, Postpaid ARPU has steadily increased over the past several quarters due to strong smartphone sales, as well as continued migrations to our higher ARPU Belief Plans. Postpaid ARPU was $54.42 in the quarter, up 5% from $51.84 a year ago.
Turning now to our financial performance shown on Slide 14. Service revenues for the quarter were $1.030 billion, which is an increase of $28 million or 3% from last year. Breaking that down a bit further, retail service revenues were $889 million, an increase of 2% with billed ARPU growing 6% year-over-year.
The inbound roaming revenues increased growing $4 million or 4% year-over-year to $86 million, primarily as a result of increased data roaming traffic. We expect continued growth in data roaming traffic both onto our networks by customers of other carriers and off our networks by our customers, but lower roaming revenues and expenses over time due to our ongoing efforts to negotiate lower reciprocal rates.
System operations expenses of $243 million were up $15 million or 7% year-over-year. This was due to several factors, including expenses associated with the deployment of the 4G LTE network, a 2% increase in the number of cell sites and service, and higher data usage and roaming expenses as our customers use more data services both on and off our networks. This data usage continues to grow, we're implementing a number of measures designed to minimize the impact on our expenses.
Net loss on equipment for the quarter was $117 million; up $20 million from last year, primarily as a result of increased smartphone sales and higher costs related to 4G LTE devices. The average loss per device sold increased year-over-year due primarily to the shift in mix to smartphones as these devices were 52% of sales versus 40% last year, and in total we sold 33% more smartphones. We expect equipment pricing will continue to be very aggressive across the industry and that our cost will be impacted by the continuing shift in mix to smartphones and the continuing introduction of 4G LTE devices throughout the year.
Please keep in mind that we're currently selling 4G devices in our 3G markets so that we can capture the cost savings immediately when the market becomes 4G.
SG&A expenses of $435 million were up 3% year-over-year due to modest increases in a number of categories including USF contributions driven by higher rates, employee related expenses, and bad debts expense driven by higher gross additions.
Operating cash flow for the second quarter of $234 million was down 8% compared to last year's $254 million. Operating cash flow margin was 22.8% compared to 25.3%.
Continuing on Slide 15. Total investment and other income net for the quarter totaled $9.7million compared to $11.6 million a year ago. Earnings related to our interest in the Los Angeles partnership were $19 million, up from $14 million last year.
Also this section of the statement of operations includes 2 of the unusual comparisons that Ken mentioned earlier. The first is gain/loss on investment where we had a loss of $3.7 million this year versus a gain of $13.4 million last year, a swing of $17.0 (sic) [$17.1] million.
The second is interest expense, which was down $13 million in the quarter primarily due to the write-off of $8 million in unamortized debt issuance cost in 2011, as well as lower interest rates on our outstanding debt.
Net income attributable to U.S. Cellular shareholders totaled $52.7 million or $0.62 per diluted share versus $74.9 million or $0.88 per share in 2011. Decline was due in part to the lower operating income but also to a higher effective tax rate. The effective tax rate for the second quarter this year was 36.9% compared to 30% last year when income tax expense was reduced by $4.5 million, primarily due to tax benefits from the expiration of the statute of limitations for certain tax years and some discrete items. For the full year, we are estimating an effective tax rate at U.S. Cellular of approximately 33%.
For the quarter, we generated cash flow from operating activities of $155 million. Cash used for additions to property, plant, and equipment, in the quarter was $221 million reflecting significant expenditures related to our 3G and 4G LTE networks, as well as for our multiyear enablement initiatives.
U.S. Cellular's balance sheet remains sound and we have significant liquidity and financial flexibility, together with expected cash flow from operations, and funds available under our revolving credit facility to meet our financing needs. At June 30, cash and short-term investments totaled $538 million and we have about $300 million of unused borrowing capacity under our revolving credit agreement.
Slide 16 shows our guidance for the full year 2012, which is unchanged from that announced earlier this year. We're estimating service revenues in the range of $4.05 billion to $4.15 billion, operating cash flow in the range of $800 million to $900 million, and capital expenditures of approximately $850 million.
Factors impacting our results for the remainder of the year will be the expected loss of $16 million in ETC revenues, higher LOE and other selling and marketing expenses associated with heavy promotional activity during the fourth quarter holiday periods, and increased expenses related to the implementation of our new billing and operational support system scheduled for implementation in 2013.
And now I'll turn the call over to Vicki Villacrez to cover TDS Telecom.