The deployment of new system to curb sale of illegal, unregistered, non-verified and pre-active mobile SIMs has put no negative impact on sale of mobile SIMs, the National Assembly was informed here on Friday. According to a survey, as many as 1.547 mobile SIMs connections were sold in February 2009, while during the corresponding period last year 1.541 million SIMs were purchased by the customers. The survey was carried out by Pakistan Telecommunication Authority (PTA) in Karachi, Lahore, Peshawar, Quetta, Rawalpindi and Muzaffarabad to ensure sale of cellular SIMs in accordance with the Standing Operating Procedure (SOP).