Welcome all

I have a very bad problems with my N900 which convinced me to switch to E75 as a alternative phone
and their are my problems :

1-the mobile automatically shuts down when i let it idle for a while 2-and it shuts down too when i try to open and close the keyboard
3-it shuts down when i just move it quickly
4-when i try to re open it i have to remove the battery and put it slowly again ... or it will not respond !
5-this is a new problem .... it's not reading any SIM card

This problems really SUCKS ... please help me in this terrible problems as fast as you can

Thanks Alot !