6.7% more mAH battery than OptimaSmart OPS-51D. More battery capacity reduces the need to charge your battery again. (1600 mAH, Li-ion vs. 1500 mAH, Li-Po)
0.4 mm Thinner than OptimaSmart OPS-51D. Slim mobile phone is easy to handle and looks gorgeous in hand. (124 x 63.5 x 10.5 mm vs. 132.2 x 67.7 x 10.9 mm)
12.5% bigger screen size than OptimaSmart OPS-51D. The bigger the screen size is better the user experience of reading and watching movie or video songs. (4.5 Inch vs. 4.0 Inch)
6.9% Higher pixel density than OptimaSmart OPS-51D. High pixel density shows sharper text and extremely detailed photos and videos. (233 ppi vs. 218 ppi)
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