For most mobile phone networks and operators, settings for these functions will be preinstalled in your phone when you buy it. In some cases you will get the option to download settings the first time you turn on the phone with a SIM card inserted.
You can download the settings directly from your phone at any time, if supported by your phone model. If not supported, please contact your network operator.
Note: Your mobile phone and network subscription must support these functions for this to work on your phone.

