How can I check what version is my phone on?
It seems that I f... up something & I can't get it to update...it even says that I don't have cssu installed & I've installed it.

When I try to update anything via x term I get: ": GPG error: https://downloads.maemo.nokia.com ./ Release: The following signatures were invalid: KEYEXPIRED 1349249546 KEYEXPIRED 1349249546 KEYEXPIRED 1349249546
W: GPG error: https://downloads.maemo.nokia.com ./ Release: The following signatures were invalid: KEYEXPIRED 1349249546 KEYEXPIRED 1349249546 KEYEXPIRED 1349249546
W: GPG error: https://downloads.maemo.nokia.com ./ Release: The following signatures were invalid: KEYEXPIRED 1349249546 KEYEXPIRED 1349249546 KEYEXPIRED 1349249546
W: GPG error: http://marmistrz.net63.net fremantle Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9431AED09369EB78
W: You may want to run apt-get update to correct these problems
Nokia-N900:~#"

tnx in advance...