9Every time you use your phone, there are several components involved for the phone to operate successfully and to process a call:All the features described in this user manual are supported by your phone. However, for all these features to work, you must have a valid SIM card(supplied by your service provider) that also supports these features. If the network that transmits your calls does not support a certain feature, thefeature will not work even if you have a fully featured SIM card. This last point is especially important when you are roaming networks.User guide legendThis type of paragraph contains important information.This type of paragraph contains information worth noting.This type of paragraph contains details of where to find related information to the topic being explained.Before You StartCellphone system structureThe people thatmake your phoneService provider Network WAP service providerThe people that supplyyour SIM card and bills The people thattransmit your callsThe people that provideyour Internet services
