Ericsson Comprehensive Guide on Phone Lock for GH198 Models
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20. Phone Lock

The Phone Lock function allows you to prevent unauthorized use of your phone in the event of a theft.

Emergency calls (112) can, however, be made when the phone is locked.

There are two levels of locking the phone: Full lock and Autolock.

Full lock:

If the full lock is enabled, the message ‘‘PHONE LOCK’’ is displayed briefly, followed by the question ‘‘CODE?’’, each time the phone is turned ON. The user then has to enter a security code to be able to use the phone.

Auto lock:

If the autolock is enabled, the message ‘‘PHONE LOCK’’ and the question ‘‘CODE?’’, will not appear in the display unless a different SIM has been inserted in the phone.

After the security code has been entered correctly, the phone can be used with new SIM. Not until the original SIM or a different SIM is inserted in the phone, will the user be asked to enter the security code again.

Observe the following:

Your phone is factory-programmed with a 4-digit security code of 0000. To improve security, you

should change this to any 3- to 8-digit personalized code.

Should you forget your security code, contact an authorized dealer. Be aware of that it, for security reasons, might take same time to solve the problem. You are, therefore, advised to select your security code carefully. You can, for example, use the same code as your PIN, or another code that you will remember easily.

Changing your security code:

1.Press M and then enter 20. ‘‘PHONE LOCK’’ is displayed.

2.Press any numeric key repeatedly until ‘‘CHG CODE’’ (Change Code) is displayed.

3.Press S. ‘‘OLD?’’ is displayed.

4.Enter the present security code and press S. ‘‘NEW?’’ is displayed.

5.Enter the new 3- to 8-digit security code and press S. ‘‘AGAIN?’’ is displayed.

6.Enter the new security code again and press S.

If you entered the old code and the new code correctly ‘‘NEW CODE’’ appears briefly. The display then returns to normal.

If you entered any of the codes

incorrectly, a beep is heard and ‘‘ERROR’’ is displayed briefly. The display then returns to normal.

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Contents Ericsson Innovatron Patents Ericsson Mobile Communications AB1208/4/P/502763 Safety and PrecautionsContents Special Functions About this manual IntroductionRecharg Overview Key functions PIN -- Personal Identification Number SIM -- Subscriber Identity ModuleElectronic lock Observe the followingMaking the Phone Ready for Use PIN check enabledTurning the Phone On SIM not insertedMessage ‘‘NO NETW’’ No Net- work is displayed Serv indicator flashesMaking a Call Entering a Phone NumberIf a number contains more than 10 digits If a call is unsuccesful Ending the callSee also the chapter Dialling Memory and Scratch Pad Call Time Meter Receiving a CallMicrophone Mute Volume ControlScratch Pad Key LockDisplay Status IndicatorsAlphanumeric Field Numeric FieldCall Alphabetic ModeFunction UseRecall Store Clear MODE/MUTE KeypadVolume control PowerAlphabetic mode letter mode EndMute -- Privacy key Chapter Basic OperationNumeric keys Ringing Signal Audible SignalsIllumination Star and HashAlarm Signal Visual SignalsError Signal Confirmation ClickStoring a Number and Name Storing NumbersMemory Full Memory ProtectionErasing a Stored Number and Name Recalling a Number Using Numeric Mode Numeric and Alphabetic ModeScrolling through the Memory Alternative Method for Recalling a NumberSpeed Calling Recalling a Number Using Alphabetic ModeReplacing the Last Digits of a Recalled Number Appending Digits to a Recalled NumberScratch Pad Dialling MemoryRecalling the Last Six Numbers Called Storing a NumberRecalling a Number Sending a Code Sending Dtmf SignalsTo send the code Pre-programmed Dtmf Signalling‘‘RETRY OFF’’ Text in the display Special FunctionUsing Method Accessing a Special FunctionStoring a New Setting Changing a SettingUsing a Combination of the Two Methods Leaving a Special FunctionKey Clicks, Silent Keypad or Dtmf Signals Ringing Signal VolumeCall Forwarding ###‘‘IF BUSY’’ ‘‘NO REPLY’’ ‘‘UNREACHABL’’ Cancelling ALL call forwarding servicesCall Barring ‘‘CHG PASSW’’ ‘‘CANCEL ALL’’‘‘ACTIVATE’’ appears ‘‘BARRING ON’’ or‘‘CHANGE PASSWORD’’ -- -- -- ‘‘CHG PASSW’’ is displayed Changing your passwordAutomatic Re-try Current Network Back LightAvailable Networks ‘‘LIGHT AUTO’’ or ‘‘LIGHT OFF’’ or ‘‘LIGHT ON’’Automatic Network Selection Network Selection ModeReviewing the list of networks List of ‘‘Preferred’’ NetworksDeleting a network Total Call Time Last Call TimeMinute Minder PIN Unblocking ProcedureDigitSIM Unblocking Key Enabling/Disabling the PIN CheckLanguage Selection Any KeyArea Code ‘‘ANYKEY OFF’’ or ‘‘ANYKEY ON’’, is displayedBattery Voltage Battery DischargeEntering and storing the area code Turning the Area Code facility on or OFFFull lock Phone LockAuto lock Changing your security codeDisabling the lock or changing the lock level Enabling the electronic lockBatteries Standard battery Slimline battery High-capacity BatteryLow battery alarm during a call Care and MaintenanceRemoval Insertion Inserting and Removing a Standard or Slimline BatteryInserting and Removing a High-Capacity Battery Recharging Slide indicatorBasic Charger Connecting the basic chargerRecharging a standard battery Hands-Free Vehicle Kit Portable Hands Free Vehicle Power Adaptor and Rapid Charger Recharging a battery and powering the phone Multi Charger Connecting the multi chargerRecharging a battery using the vertical compartment Recharging a battery using the horizontal compartmentObserve the following Received Signal Is Weak Serv Indicator FlashesFlashing Red Indicator Light -- Alarm Signal Sounds Phone Does Not Come OnChanging Your Password Steady Red Indicator LightMessages ‘‘UPDATE ERROR’’ ‘‘SIM UPDATE’’ or Password changing was successful‘‘SIM SECUR’’ or Inserting the SIM

GH198 specifications

The Ericsson GH198 is a notable mobile phone that emerged in the late 1990s, encapsulating the early era of cellular technology. This device, popular in its time, encompassed several features and characteristics that appealed to users seeking reliable communication solutions.

One of the main features of the Ericsson GH198 was its compact design, which allowed for easy handling and portability. Weighing in at a mere 300 grams, it was lightweight compared to many of its contemporaries. The device boasted a monochrome LCD display, which, while simpler than today's standards, offered clear and readable text for phone numbers and messages. The display was complemented by a user-friendly interface, allowing for seamless navigation through features.

The GH198 operated on the GSM (Global System for Mobile Communications) standard, a significant technology in mobile telephony that laid the groundwork for modern mobile networks. GSM technology enabled the GH198 to provide enhanced voice quality, reliability, and better coverage than previous analog systems. The phone supported various frequency bands, enhancing its usability across diverse regions.

One of the standout characteristics of the Ericsson GH198 was its extended battery life. The device utilized a NiMH battery, which provided talk time of up to 12 hours and standby time of up to several days. Users appreciated this longevity, as it reduced the frequency of charging interruptions, allowing for prolonged connectivity on the go.

In terms of functionality, the GH198 offered essential features such as SMS (Short Message Service) capabilities, enabling users to send and receive text messages—a feature that was gaining popularity during its release. Additionally, the phone included a phonebook memory capacity for storing hundreds of contacts, making it convenient for users to maintain their personal and professional connections.

The Ericsson GH198 also supported functionalities such as call waiting and caller ID, enhancing the overall user experience. Its simple yet effective design made it ideal for both business professionals and everyday users looking for straightforward communication tools.

In summary, the Ericsson GH198 embodied the pinnacle of mobile technology in its era. With its compact design, reliable GSM connection, impressive battery life, and essential communication features, it played a significant role in the evolution of mobile phones, paving the way for future innovations in the telecommunications industry.
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