Du's net profit for the second quarter has more than doubled to Dhs275m compared to Dhs115m in the same quarter a year ago. The number of subscribers had also seen the addition of 182,100 net active mobile users during the period, taking the total at quarter end to 3,921,100. The telco's fixed line subscriber base also grew 52% from 328,600 lines in Q2 09 to 499,900 lines in Q2 10, with 43,200 lines added during the quarter.