Samsung SGH-X640 Manual

Also see for SGH-X640: User guide Service manual Service manual

Contents

Access codes168PUK2The PUK2, supplied with some SIM cards, isrequired to change a blocked PIN2.If you key in an incorrect PUK2 ten times insuccession, you cannot use the functions requiringthe PIN2. Contact your service provider for a newcard.You cannot change the PUK2. If you lose the code,contact your service provider.Call barring passwordThe 4-digit call barring password is required whenyou use the Call Barring function. You obtain thepassword from your service provider when yousubscribe to this function.You can change this password using the Changebarring password menu option (Menu 3.2.7). Forfurther details, see page 76.169Health and safetyinformationExposure to Radio Frequency (RF)SignalsYour wireless phone is a radio transmitter andreceiver. It is designed and manufactured not toexceed the emission limits for exposure to radiofrequency (RF) energy set by the FederalCommunications Commission (FCC) of the U.S.Government. These limits are part ofcomprehensive guidelines and establish permittedlevels of RF energy for the general population. Theguidelines are based on the safety standards thatwere developed by independent scientificorganizations through periodic and throughevaluation of scientific studies.The standards include a substantial safety margindesigned to assure the safety of all persons,regardless of age and health.The exposure standard for wireless phones employsa unit of measurement known as SpecificAbsorption Rate (SAR). The SAR limit set by theFCC is 1.6W/kg.*SAR tests are conducted using standard operatingpositions specified by the FCC with the phonetransmitting at its highest certified power level in all* In the U.S. and Canada, the SAR limit for mobile phonesused by the public is 1.6 watts/kg (W/kg) averaged overone gram of tissue. The standard incorporates asubstantial margin of safety to give additional protectionfor the public and to account for any variations inmeasurements.