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Still, for the price, you can’t grumble too much, and the Galaxy A21s’ screen manages to excel in other areas. The display reached a maximum luminance of 553cd/m² on the adaptive brightness setting, the contrast ratio is rather good at 1,267:1, and viewing angles aren’t too shabby, either. Samsung Galaxy A21s review: Performance and battery life If you care about battery life, which I would argue is a far more important metric, then you’re in for a real treat with the Galaxy A21s. In our standard battery-rundown test, where we set the screen to 170cd/m², switch on flight mode and play a looped video, the Galaxy A21s lasted 22hrs 48mins. That’s more than five hours longer than the next best phone in the graph, the Realme 6.
Unusually for a Samsung phone, there aren’t multiple display profiles to choose from, and sadly what we get isn’t all that special. In technical testing, it covered 73% of the sRGB colour gamut, with a total volume of just 84%. Colour accuracy isn’t up to scratch either, with a measured Delta E of 4.23. Some colours, such as light green and dark red tones, looked particularly dull. It’s a similar story when it comes to graphics processing. The Galaxy A21s manages to close the gap slightly, but it still lags behind the others. The lower-resolution screen does help boost performance, however, and I didn’t notice any glaring issues in less demanding games such as Stardew Valley and Gris.
As I mentioned earlier, the Galaxy A21s comes with a quadruple-camera array, consisting of a main 48MP (f/2.0) lens, supported by an 8MP (f/2.2) wide-angle unit, 2MP (f/2.4) macro camera and a 2MP (f/2.4) depth sensor. A 13MP (f/2.2) selfie camera sits on the front of the phone.