Flashing from N900 xterminal: (no need for PC): (source) * do a backup, have a pc nearby and know you are able to flash the n900 with flasher-3.5 - just in case 0. Launch xterminal app then type sudo gainroot (need rootsh installed) 1. type "softupd -vv -s --local" (thats double v) 2. open new terminal 3. type "flasher --local -f -k <kernel_zimage_file_with_path>" 4. you see the flashing (takes some time) 5. type "sync" to save changes 6. type "reboot" and enter to restart 7. Test out your phone as usual. (Apps, browser, camera, phone etc etc) 8. If any abnormal events occur frequently (crash, hang, screen corruption etc), turn it off, flash it to a slower kernel and test again.