Idea Cellular has crossed the 700,000 subscriber mark in Delhi. The company's revenues from Delhi have grown by 3.7 per cent during the April-June 2005 quarter compared to the previous quarter. Idea's market share (revenue-wise) has increased to 14.1 per cent in the last one year from 12.3 per cent. Its average revenue per user (ARPU) has also shown an uptrend with a 1.2 per cent growth to Rs 419 for the period April-June 2005 from Rs 414 in the previous quarter.