How do I add my words to the keyboard dictionary ? Just click on the word and then press the plus sign.
Where can I find the version of the system / firmware? Version of the system / firmware can be found in settings> about> more information.
How to switch the phone module into 2G mode ? To disable 3G, go to settings> cellular (or in settings> mobile network) and switch the 3g connection in position off.
How to disable data transmission (Internet)? To disable the sending of data, settings> cellular (or in settings> mobile network) switch data connection into position off
Is it possible to display the main screen frequently used settings (Bluetooth, WiFi, etc.)? Yes you can. Use the Quick settings Windows Phone 7.
How to disable data transmission (Internet) in roaming? To disable data roaming in the settings> cellular (or in settings> mobile network) switch data roaming option in the position don't roam.
How to select multiple e-mail messages? Just click on the left of the message in the list and you will be able to select multiple. Then you can delete them, mark as read or unread.
How do I hide my number or show it only to people from your contact list? Go to Settings> Applications-phone and in the field "Show my caller ID" to Please select a "no one" or "my contacts" respectively.
