Hello.. I have this problem with my Desire, has gotten really annoying 'cause I miss some calls because of it So, sometimes when I'm using it, sometimes at random, the phone freezes for just a sec, shuts down all apps and goes to the input PIN screen. The SD card preparation symbol is there for a while, but all the widgets and other SD card things still work. After I input the PIN, it instantly goes to my homescreen on Sense, everything ready. But after inputting the code, if I instantly go to Phone app to call someone, that app lags and I cannot call anyone until I reboot the phone. So, do you guys think the problem in the SIM card or somewhere else? Thanks!