Reference informationCopyright © 2004 Nokia. All rights reserved. 57You cannot change the PUK code. Ifyou lose the code, contact your serv-ice provider.PUK2 code (8 digit)The PUK2 code, supplied with someSIM cards, is required to change ablocked PIN2 code.If you key in an incorrect PUK2 codeten times in succession, you cannotuse the functions requiring the PIN2code. Contact your service providerfor a new card.You cannot change the PUK2 code. Ifyou lose the code, contact your serv-ice provider.Barring passwordThe barring password is needed whenusing the ‘Call barring’ function. Youobtain the password from your serviceprovider.Ciphering indicatorDepending on the network, the ci-phering indicator may be dis-played during a call to notify that callencryption is off.For more information, contact yournetwork operator.Battery informationLi-Ion battery BLB-2 is the manufac-turer-approved rechargeable batteryis available for your phone.Charging anddischarging the battery• Your phone is powered by a re-chargeable battery.• Never remove or replace the bat-tery when the phone is connectedto the charger.• Note that a new battery’s full per-formance is achieved only aftertwo or three complete charge anddischarge cycles!• The battery can be charged anddischarged hundreds of times butit will eventually wear out. Whenthe operating time (talk-time andstand-by time) is noticeably short-er than normal, it is time to buy anew battery.• Use only batteries approved by thephone manufacturer and rechargeyour battery only with the charg-ers approved by the manufacturer.• When a charger is not in use, dis-connect it from the power source.Do not leave the battery connect-ed to a charger for longer than aweek, since overcharging mayshorten its life. If left unused a ful-ly charged battery will dischargeitself over time.