A. Felson
works great on my sprint htc evo 4g lte.  Formatted w/ fat32 so of course the maximum file size is 4gb meaning no full length hidef movies.  However, this isn't a problem;  I bought the card for putting a music library on my phone.Like all class 10 micro-sdhc cards, it does NOT do 10MB/s, but it's closer than any other class 10 card I've ever tried.  Most do 3-4MB/s.  Kingston 32GB did 7MB/s.  This card does about 8-9MB/s.Can't wait till 128GB and 256GB cards become available and affordable.