We've bought the memory card for extra storage in a Samsung Galaxy S2, although according to the description just an extension of 32GB is possible. By useful Rezesionen here at Amazon (Amazon is for us the No.1 in terms Rezesionen and shopping with 100% confidence !!) has been confirmed in advance that these larger memory cards from SanDisk works. The SanDisk Ultra 64GB Class 10 Ultra microSDXC memory card works flawlessly and quickly after formatting the device settings of the smartphone, which lasted just 10 seconds. From the specified 64GB 59,46GB are in the smartphone available.