G e n e r a l i n f o r m a t i o n14PUK and PUK2 codes (8 digits)The PUK (Personal Unblocking Key) code is required to change a blockedPIN code. The PUK2 code is required to change a blocked PIN2 code.If the codes are not supplied with the SIM card, contact your networkoperator or service provider.Barring password (4 digits)The barring password is required when using the Call barring service, seeSecurity settings on page 92. You can obtain the password from yourservice provider.Wallet code (4 to 10 digits)The wallet code is required to access the wallet services. If you key in anincorrect wallet code several times, the wallet application is blocked forfive minutes. For further information, see Wallet on page 102.■ Overview of the phone functionsYour Nokia 6810 phone is approved for use on EGSM 900,GSM 1800 andGSM 1900 networks. It provides many functions that are practical fordaily use, such as calendar, radio, loudspeaker, clock and alarm clock.Your phone also supports the following functions (many of which arenetwork services):• EDGE (Enhanced Data rates for GSM Evolution), see EGPRS on page87. EDGE packet transmission networks enable faster connectionthan GPRS.• The xHTML browser, which allows you to retrieve and view colourfuland rich graphical content from service providers’ web servers. SeeServices (Menu 9) on page 113.• Presence-enhanced contacts, which allow you to conveniently shareyour availability information with your colleagues, family and friendswith compatible devices and services. See My presence on page 73.• Chat, which is a way of sending short text messages that aredelivered to online users. See Chat on page 55.rm-2_en1_FCC.fm Page 14 Monday, February 16, 2004 8:14 AM