Acquired this card a month ago for use in my phone Samsung Galaxy S4 and only have taken issues with it.The micro sd card is really bad, the camera takes a long time to be ready and repeatedly resets the phone. Absolutely not recommend it in my previous phone (S3) used a micro sd card 32GB Samsung brand and never had problems with it.To correct the problem of instability recommend formatting the card, I did and the problem remains the same.Live outside the U.S. and I must acquire excellent quality products because the cost of returning it exceeds the cost of the product.Next time buy a card SAMSUNG brand that never gave me problems.