noob questions 2 :)

[Guest wahba87]

continuing this series : http://www.modaco.com/content/i900-omnia-h...noob-questions/ B)

now I installed the original rom , everything works perfectly , but I've also some questions please

1- how to lock the screen ?

2- messages (sms) not working :S , I can receive sms but I cannot send , any help ?

3- does this mobile need an antivirus ?

3- I'm fine with the english system , but it can't read arabic , how can I add this feature to it ?