I wasn't absolutely certain if this would work in my Samsung Galaxy SIII (an SGH-I747M) from a regional carrier here in Alaska.I read several reviews, but took a chance the 64GB card would work in my device and was pleased when it arrived.Opting for the &#34;Frustration Free Package&#34; it was a very simple matter to open the little cardboard envelop to retrieve the contents.  A side note here, I do appreciate the Amazon packaging for items such as this, where a clamshell type of container adds no value...The card is well made and seems a quality product.  Installed the card and it was recognized instantly on boot.  The full capacitywas recognized.Maybe I am old school when it comes to memory cards, but I always format them in the device I intend on using them (at least initially.)  In this case, there were no issues.While I haven't scientifically measured read / write speeds of the card, performance is respectable.  I have suffered no issuesrelated to the operation of the card.I would highly recommend this product if you are looking for this capacity and your device will accept the MicroSDXC format.  To that end, several friends have purchased (and been satisfied) with this memory card in their devices.