The document analyzes quality of service and billing complaints received by major mobile operators (Jazz, Telenor, Zong, Ufone) in Pakistan during May 2020. It provides city-wise and operator-wise percentages of different types of complaints including quality of service issues, coverage issues, and billing issues. The city that lodged the most complaints overall was Faisalabad, followed by Lahore, Rawalpindi, Karachi, and Gujranwala. Jazz received the highest percentage of overall complaints at 36%, followed by Telenor, Zong, and Ufone.