I was going to buy a cheaper MicroSD card but thought about it, I was replacing a cheaper one that had failed, so this time I spent the extra money and got the Samsung one for my Samsung Galaxy phone. So far, so good. I am frustrated with the number of apps that you just can't put on the card but that's the Android's fault, the card itself is working fine. I hope it will last for the rest of the life of this phone. I know from experience the quality of micro SD cards does vary widely, buyer beware!