To use Localize Friends with the mobile phone, it must be configured for WAP/GPRS. Execute the following Steps:
User of prepaid cards must call the service center of their provider to activate GPRS. The activation is done in 1-24 hours. Mobile phones with contract do usually not need to do that.
The mobile phone must be configured for using GPRS. Get information about on the web site of your net provider. Normally you have to send a SMS and get the configurations as response.
Simular to GPRS you have to get the configuation from your net provider. Before you can receive MMS, you have to send a MMS before once.