5.Back Light

The illumination of the display and keypad can be turned ON or OFF all the time, or it can be used in an automatic mode as described in the section Illumination in the chapter Details on the Display and Keys.

This special function allows you to turn the illumination ON or OFF, or to select the automatic mode.

1.Press M, followed by 5. The current setting is displayed, either

‘‘LIGHT AUTO’’ or ‘‘LIGHT OFF’’ or ‘‘LIGHT ON’’.

2.Turn the illumination OFF or ON, or select the automatic mode of illumination by pressing any numeric key.

3.Store the new setting by pressing S, ▲ or ▼.

When the phone is powered from an external source via the receptacle at the bottom of the phone, the illumination will be ON all the time, regardless of whether ‘‘LIGHT AUTO’’ or ‘‘LIGHT ON’’ is selected.

6.Current Network

This Special Function displays the name of the network the phone is operating on.

1.Press M, followed by 6. The name of the current network appears for 10 seconds.

If the phone has not registered on a network, ‘‘NO NETWORK’’ is displayed.

2.Press C to leave the Special Functions, or ▲ or ▼ to move on to another Special Function.

7.Available Networks

This Special Function allows you to select a network from those in range.

1.Press M, followed by 7. ‘‘AVAIL NETW’’ is displayed.

2.Press any numeric key or S. ‘‘WAIT’’ is displayed briefly.

a.If the ‘‘home’’ network is in range, its name will be displayed, followed by ‘‘CURRENT’’ if it is the current network, or ‘‘HOME’’ if the phone operates on another network.

b.If the ‘‘home’’ network is not in range, the name of another network in range will be displayed, followed by either ‘‘CURRENT’’, ‘‘PREFERRED’’,

‘‘FORBIDDEN’’ or ‘‘AVAILABLE’’.

‘‘Preferred’’ means that a network is included in the list of ‘‘preferred’’ networks on your SIM. (This list can be changed with Special Function No. 10.)

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Ericsson GH198 user manual Back Light, Current Network, Available Networks, ‘‘LIGHT AUTO’’ or ‘‘LIGHT OFF’’ or ‘‘LIGHT ON’’
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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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