I have an AT&T N1 that so far as I know is completely stock and has 2.3.3. Android version 2.3.3 Baseband version 32.41.00.32U_5.08.00.04 Kernel version 22.214.171.124-59423-g08607d4 android-build@apa28 #1 Build number GRI40 I have not received the OTA update to 2.3.4. I have tried the "checkin" procedure and Menu/About phone/System updates says "Your system is currently up to date." I followed widely available directions to do a manual upgrade to 2.3.4, mostly without trouble, but it didn't work. I searched these forums and found some similar reports, but none of them seem to have come to a successful conclusion. Here is an outline of the last few steps that I took and the results: I chose "Flash zip from sdcard" and saw "Choose zip from sdcard". I selected "update.zip". I pressed the trackball to confirm "Install: update.zip?" I saw several messages, ending with: "E: No signature (226 files)" "E: Verification failed" "Zip verification failed!" "Zip isn't signed correctly!" "Installation aborted" Any suggestions would be appreciated!