iPhoneXS MAX/11Pro iPhoneX/XS/11ProMax iPhoneXR/11 iPhone8/7/6s/6 Plus iPhone8/7/6s/6 iPhone5s/5c/5 iPhone4s/4
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URL https://www.researchgate.net/publication/288303807/figure/fig1/AS:311239419940864@1451216668048/An-example-of-QR-code.png URL2 https://www.researchgate.net/figure/An-example-of-QR-code_fig1_288303807
