KARACHI: The user data throughput of 4G services of Jazz is the highest followed by Zong, whereas data throughput of Telenor is the lowest among all Next Generation Mobile Services (NGMS) operators in Pakistan, Pakistan Telecommunication Authority (PTA) Cellular Mobile Operators' Quality of Service Survey Results - 2018 shows. However, user data throughput of 4G services is higher than the benchmark of 2.0 Mbps set in the respective licenses of all Next Generation Mobile Services (NGMS) operators in Pakistan. User data throughput (4G) of Jazz clocked in at 20.67 Mbps followed by Zong at 14.05 Mbps and Telenor at 6.23 Mbps, the Pakistan Telecommunication Authority (PTA) survey result shows. In the year 2018, PTA has conducted quarterly Quality of Service (QoS) survey jointly with Cellular Mobile Operators (CMOs) using NEMO automated QoS tool. During the period, a total of 27 cities of Pakistan including AJK, have been surveyed. The performance of data services of CMOs has been checked by measuring user data throughput and Signal Strength Key Performance Indicators (KPIs). This KPI defines user data rate (Internet speed) to be provided by NGMS operators to mobile users across the coverage areas. User data throughput of 3G services is higher than the benchmark of 256 Kbps set in their respective licenses. Data throughput of Zong is the highest at 6.35 Mbps followed by Jazz at 5.22 Mbps and Telenor at 3.64 Mbps, whereas data throughput of Ufone (3.45 Mbps) is the lowest among all NGMS operators.