I feel like I have to report here since I have such great results. My stock 2GB sd card speeds (random and sequental) I don't know what the class is since there is no number on it:
And here is my newly bought 16GB SanDisk class 4 (random and sequental speeds)
As you can see random speeds are AWESOME Only write speed for sequental speed on newly card is a little slower. But for general phone usage this card outperforms many class 10 cards due to great random speeds
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