Start by keeping your devices for longer, having them repaired and buying second-hand or refurbished, since 99% of a smartphone's footprint does not depend on its use. Next, limit the number of screens: a television has a footprint of 370 kgCO2e, a smartphone 80. Values per use are smaller per unit (2.5 gCO2e for a 1 MB email, 36 to 64 gCO2e for 1 hour of video), and we have not found a source that quantifies what reducing these uses avoids on the data centre side.
Read the source article: Digital carbon footprint statistics for 2026, with sources