5.9 grams Lighter than Bird F520. light weight phone is easy to hold and can kept in your pocket for long time. (84 grams vs. 89.9 grams)
0.5 mm Thinner than Bird F520. Slim mobile phone is easy to handle and looks gorgeous in hand. (109.8 x 48 x 16 mm vs. 94 x 46 x 16.50 mm)
22.2% bigger screen size than Bird F520. The bigger the screen size is better the user experience of reading and watching movie or video songs. (2.2 Inch vs. 1.8 Inch)
59.6% Higher pixel density than Bird F520. High pixel density shows sharper text and extremely detailed photos and videos. (182 ppi vs. 114 ppi)
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