The Realme C21 is the cheapest mobile phone in the test. It brings up the rear in terms of working speed and operating speed. The display is also comparatively dark and lacks contrast. On the other hand, it is the quickest to the charging station. The CO2 emissions are also pleasingly low.

Update September: 29 new mobile phones in comparison New in Stiftung Warentest's mobile phone test: 29 current smartphones. Among them is the super-light Carbon Mobile Carbon 1 Mark II. The "mobile phone of the future" (as advertised) has a housing made of carbon fibre and weighs only 125 grams...