Hi someone who cared to give some advice to me,

Looks like now my N900 have some major problems and I need someone to help me with it.

When I tried to apt-get update, it download like normal but somehow it doesn't complete the update.

W: GPG error: https://downloads.maemo.nokia.com ./ Release:
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ADB4438160A655EF
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.

But then, when I tried to type dpkg --configure -a on xterm it gets the following problem

dpkg: unable to open/create status or database lockfile: No space left on device

I looked up some threads on how to solve this problem. Most of it asked to hard reset the phone using the flasher. But my problem is I can't hard reset it due to my USB port is broken.

About my application manager, it always says 'operation failed' when I open it. I can't get through uninstall or install or update or catalogues.

So how can I solve this problem.? I'm so confused and I don't know what to do right now. I tried factory reset and clear device on setting's menu. It still won't work. Somehow this thing makes me wanna throw this phone =="

So, I'm begging for someone to help me. Please please please :'(