Goshu, B.S. 2026. Prevalence and Correlates of Problematic Smartphone Use Among Ethiopian Youth: A Multi-City Cross-Sectional Study in Addis Ababa, Hawassa, Bahir Dar, Dire Dawa, Harar, Jijiga, and Adama. Matondang Journal. 6, 1 (Aug. 2026), 62-81.