I recently upgraded by Blackberry 8900 4.something to OS 188.8.131.520. All is great, im loving the threaded SMS. But I am REALLY missing my lock button and standby button. (Many threads on this issue, basically the lock button no longer does a password lock and the standby button is gone) I heard that OS 184.108.40.2061 does not have this issue. I am willing to downgrade however does .411 have the threaded SMS? That is the reason why I went to 5.0 in the first place! Thank you.