<p>Mobile and internet technologies are transformative tools that enhance agricultural development by improving input efficiency and management. However, research on their impact on fertilizer use efficiency (FUE) and fertilizer use intensity (FUI) remains limited. This study examines the dynamic effects of mobile and internet technologies on fertilizer use efficiency and intensity in cereal crop production across 26 African countries from 2000 to 2021. Fertilizer use efficiency (FUE) is measured as the crop production index per unit of fertilizer consumption, while FUI reflects fertilizer application per hectare of arable land. Using Augmented cross-sectional CIPS and CADF tests, along with Pedroni and Kao cointegration tests were used. We employed fixed effects (FE), Generalized Method of Moments (GMM), and Pooled Mean Group (PMG) models to estimate the effect of mobile and internet. The robustness of the PMG estimates validates using Ordinary least squares (OLS) and fully modified ordinary least squares (FMOLS) methods. We find that mobile use increases FUE by 0.078 productivity per unit of fertilizer used, while internet use increases FUE by 0.008 productivity per unit of fertilizer used. Mobile use reduces FUI by 0.060&#xa0;kg per hectare, and internet use reduces it by 0.003&#xa0;kg per hectare. The GMM analysis validates these effects, with varying magnitudes. Long run estimates of the PMG indicate that mobile use and internet use significantly enhance FUE and reduces FUI. The heterogeneity analysis shows that effect of mobile and internet use on FUE and FUI varies by income group and region. Governments should enhance access to ICTs by providing mobile data subsidies, establishing ICT literacy training programs, and fostering public–private partnerships to develop applications that are relevant to local communities.</p>