text: The percentage of subscribers with smartphones increased to 75% of 
  our overall postpaid subscriber base, compared to 69% at the end of 
  2012. Smartphone subscribers typically generate significantly higher 
  ARPU and are less likely to churn. 
  Other operating expenses (excluding retention spending), were down 
  slightly from 2012, due to a continued focus on cost productivity 
  initiatives we are implementing across various functions. 
  
  **Higher Adjusted Operating Profit**
  Adjusted operating profit was 3% higher this year compared to last 
  year because of continued growth of wireless data, our improvements 
  in cost management and efficiency and lower volumes of hardware 
  sales and upgrades. Adjusted operating profit margin as a percentage 
  of network revenue increased this year to 46.8% from 45.6% in 2012. 
  
  **SMARTPHONES AS A PERCENTAGE OF POSTPAID SUBSCRIBERS**
  (%) 
  
  **2013** **75%**
  
  2012  69% 
  
  2011  56% 
  
  **WIRELESS ADJUSTED OPERATING PROFIT**
  (IN MILLIONS OF DOLLARS) 
  
  The decrease in prepaid subscriber net additions was mainly because of 
  increasing competition at the lower end of the wireless market where 
  prepaid products are mainly sold. 
  
  **2013** **$3,157**
  
  2012  $3,063 
  
  2011  $3,036 