6 Getting Startedthe Options window. This number is available from your local cellular networkoperator. lf, however, this number is already contained in the memory of yourmobile phone, Setup will retrieve it from there. lf not, you will have to type inthe number manually in Options when you want to send a short message. Seethe user’s guide of your phone for more details on storing the short messagecentre phone number in the phone memory.Data and Fax CommunicationYou can use your mobile phone for sending and receiving data with a varietyof Windows compatible fax, terminal, and data programs. Remember to closethe Nokia PC Suite user interface, when you are making a data call. The datatransfer and fax functions depend on the programs you have chosen, not onthe computer nor this program. For information on how to use acommunications software package, please refer to its documentation for astep by step description.The phone’s internal data supports three PC Fax standards: EIA/TIA Class 1,Class 2 and Class 2.0. lf you have problems using the program for faxtransmission, ensure that the remote end fax machine is Group 3 compatible.Before you can benefit from the functions provided by the program, you mustsubscribe to the corresponding services (data, fax or SMS) from your cellularnetwork operator.Charge in Phone and Computer BatteriesThe power consumption of the phone is approximately the same for data/faxcalls as it is for voice calls of the same length. For charging the phone battery,refer to the user's guide of your phone.You can use the phone with the PC Suite for Nokia 8250 even when the phoneis being charged.For portable usage, it is recommended that you have a charged computerbattery. lt is possible to charge the battery while in use.Signal Strength Affecting Cellular TransmissionsWhen you are sending a fax, data, or an SMS message, you need to be in anarea with network coverage. Cellular connections can be made from mostlocations where your mobile phone operates.Cellular networks differ from landline networks in many ways, for example,traffic loads and the strength of radio signals may vary in a cellular networkand cause handovers.lt is recommended that you move the phone to a location where the strongestpossible cellular signal can be obtained. When the signal is strong, cellulartransmission is efficient.