I got me this Memory Stick bought 4 days ago because I am no longer got along with my 512MB. Accustomed fast delivery through Amazon. At first I was a little confused that he did not fit into my phone, then I realized, however, that he was only fit into an adapter. So pulled out and into the mobile phone (W580i). The stick was immediately recognized and 1906 MB free display. Top! (Manufacturer-MB and actual MB are fundamentally different, because "normal" MB actually have 1024KB, Manufacturer MB but basically 1000, hence the slight deviation) Have the phone connected to the PC and transferred directly to my music. Unfortunately, the transmission speed a bit to be desired, I reach only 400kb / s but that was in the previous map before that. Unfortunately you have to wait until they were transferred then in such large amounts of data. Therefore, a star deduction.
The speed of access to the phone itself is fine: A top device.