<https://www.gadgetgear.nl/2021/02/samsung-one-ui-3-1-brengt-s21-features-naar-s20-note20-en-z-series/#webpage>
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"Samsung One UI 3.1 brengt S21 features naar S20, Note20 en Z Series - GadgetGear.nl"
<https://www.gadgetgear.nl/2021/02/samsung-one-ui-3-1-brengt-s21-features-naar-s20-note20-en-z-series/>