Since 2015 to till I am using samsung evo SDHC cards 16 gb . price of this item is 300 approx in market with class 10. you know speed of this card is 48 mb/ s for transfer of file to another device. class 10 memory card make it fast for smartphone. with this memory card your mobile running fast . according to my openion this memory card is best in world for smartphone users. you can not found any problem for long time. and it’s look is very sexy and good quality product.