Six months ended December 31
$158 million net profit, up from $145 million.
$1.72 billion revenue, down 4.1%.
22c a share annual and 3c special dividend planned.
A focus on growth in mobile has paid off for Spark, lifting the listed telco's first-half profit by 9 per cent.
Managing director Simon Moutter said the mobile growth had offset the declining sales of the fixed-line business.
"The business is in the best shape it has been in in many years," Moutter said.
Net profit rose to $158 million, or 9c per share, in the six months ended December 31, from $145 million, or 8c, a year earlier, the Auckland-based company said.
Earnings before interest tax, depreciation and amortisation (ebitda) gained 4.3 per cent to $455 million, as revenue fell 4.1 per cent to $1.72 billion. Forsyth Barr analyst Blair Galpin expected ebitda of $490 million on sales of $1.71 billion.