Hi, I got my Optimus one not long ago and I bought kingston 8G for it though it would work fine. The phone read the card well and show the memory correct and I can use it pretty good on my phone. The thing later I found out is the phone itself restart after the idle time exceed 1hr which is crazy. The phone works really good until I upgrade my original sd card (samsung 2G which came in with) to Kingston microsd 8G. I don't know where exactly is wrong, and I couldn't return the sd card either since it work fine on both phone and on computer with card reader. If someone got same problem with me, please let me know or help me out!! Thanks in advance.