Smartphone penetration by age group in Germany 2021 | Statista
Mobile Internet Usage in Germany | Web Usage Data
Smartphone Users in Germany Who Have Used Their Smartphone to Make In-Store Payments, by Demographic, Dec 2018 (% of respondents in each group) | Insider Intelligence
Always practise safe text: the German traffic light for smartphone zombies | Cities | The Guardian
Germany's rural 4G users still spend one-fourth of their time on 3G and 2G networks | Opensignal
Mobile phones, smartphones: users in Germany 2016 | Statista