I don't know, why User Guide keeps mum about some basic things.

How check firmware version?

• Press left dialog key during displayed IMEI.
  
  How check Service Provider locking?
  
• Take out SIM and enter *#0606#
  
  Memory capacity avalaible for new words in T9?
  
• cca 1 kB
  
  Memory capacity avalaible for off-line wap?
  
• cca 44 kB

Why only some outgoing SMS are saved?

• If you leave SMS submenu by long press key On/Off/End (or elapsing 2 minutes), message is saved.
• If you leave SMS submenu by short press key On/Off/End, message isn't saved.

Why alarms sometimes not works, when phone is switched off?

• If you don't use key On/Off/End after switching Phone off, all active alarms will be work normally.
• If you press shortly key On/Off/End after switching Phone off, all alarms will be temporally deactivated.