Have two tickets ordered - both of which are each in a Samsung Galaxy Ace in use and work there for 4 months without any problems. Write and read speed are OK, but you can tell when used in mobile phone, mp3 player or camera it anyway not much. An adapter from microSD to SD is also supplied in order to use the card for example. In common card readers. SanDisk is a well-known manufacturers - for the price you can safely access!