I dont know why there is nothing set as sticky but i would recommend to put a note here, that atp-get commands can/will brick your phone easily. You could do it with N900 (i never had problems with that) but one atp-get upgrade brought my N9 straight to Nokia Care. I heard of others with the same problem. Maybe this really should be made sticky as i guess that a lot of people wanna update their device via console.
Why did you bring it to Nokia care?
If you know nought to use apt-get, you also should be able to figure out how to flash it again.
There is no need to give the device out of your hands!
Hello! no more time ago I had blocked my n9. I used upt-get update when my phone no be connected to lan. And my phone had small charge level. After his power off I cant started him( How i think when you use offline apt-get updae, phone cant take package lists and installs old version packege. But it can reduce the level of firmware. And as you know, this can not be done!