The Wiko Power U20 only convinces with a strong battery in testing - and has little else to offer. The performance could be considerably better for a mid-range smartphone, and the outdated features also have some drastic gaps. The charging time is simply far too long, even for this large battery...

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