Hi friends I purchase strontium 16 GB card for my mobile from online flipkart. I use this card for last two months. this is class 10 memory card thats why I bought this card. when u transfer data to another card or pc or pen drive this card generate a good speed.features of this card is awsome. if u looking for a good performing card to your mobile then I would recommne strontium 16 gb memory card.