Menu functions

Security (Menu 9.4)

Use this menu to protect the phone against unauthorised use by managing the several access codes of your phone and SIM card.

If you enter an incorrect PIN /PIN 2 three times in succession, the SIM card is blocked. To unblock it you need to enter your PUK/PUK2 (Personal Unblocking Key). The codes are supplied by your network operator.

PIN check (Menu 9.4.1)

The 4-to 8-digit PIN (Personal Identification Number) protects your SIM card against unauthorised use. When this feature is enabled, the phone requires your PIN each time it is switched on.

Change PIN (Menu 9.4.2)

Use this menu to change your PIN. The PIN Check feature must be enabled to use this feature.

Phone lock (Menu 9.4.3)

The Phone lock feature locks the phone from unauthorised use.

When this feature is enabled, you must enter a 4- to 8-digit phone password each time the phone is switched on.

The password is preset to 00000000. To change the password, use the Change password menu.

Change Password (Menu 9.4.4)

Use this menu to change your phone password. The password is preset to 00000000.

Privacy (Menu 9.4.5)

Use this menu to lock your media contents, including MMS messages, voice memos, images, and sounds.

1.Press <Select> to check the item(s) to be locked.

2.Press <OK> to lock the marked items.

3.Enter the phone password and press <OK>.

To access a locked item, you need to enter the phone password.

SIM lock (Menu 9.4.6)

The SIM lock feature allows your phone to work only with the current SIM by assigning a SIM lock code. You

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Samsung SGH-X640 manual Change Password Menu, PIN check Menu
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SGH-X640 specifications

The Samsung SGH-X640 is a feature-rich mobile phone that was launched in the mid-2000s, showcasing Samsung's commitment to innovation in the telecommunications sector. This sleek and stylish device was designed to cater to the growing demand for advanced mobile features while still being user-friendly.

One of the standout characteristics of the SGH-X640 is its compact and lightweight design, making it highly portable and convenient for everyday use. Weighing just 90 grams and measuring 86 x 44 x 21 mm, this phone easily fits in the palm of your hand or pocket. Its clamshell design not only adds a touch of elegance but also protects the screen from scratches and damage when not in use.

The SGH-X640 comes equipped with a bright 128 x 160 pixel display that supports 65,536 colors, providing vibrant visuals for images, graphics, and menus. This clarity allows users to enjoy multimedia content such as photos and videos, further enhanced by its integrated camera, which features a 1.3-megapixel resolution. This camera allows for decent photo-taking capabilities, perfect for capturing special moments on the go.

In terms of connectivity, the SGH-X640 supports GPRS Class 10, allowing for relatively fast internet browsing and data transfer capabilities for its time. The phone features a WAP 2.0 browser for accessing mobile content, enabling users to stay connected to the web wherever they go. Bluetooth technology is also included, facilitating easy wireless sharing of files and media with other compatible devices.

The device boasts an impressive battery life with a standard Lithium-ion battery, offering talk time of up to 5 hours and standby time of approximately 200 hours. This lengthy battery performance is ideal for users who rely on their mobile phone throughout the day without the constant worry of recharging.

Additionally, the SGH-X640 supports various multimedia formats, making it a suitable companion for music and video playback. Users can easily download ringtones and applications, personalizing their devices to suit their preferences.

Overall, the Samsung SGH-X640 exemplifies the combination of style, functionality, and technology that defined the early 2000s mobile phone market. Its thoughtful design and impressive features make it a memorable entry in Samsung's legacy as a leading mobile manufacturer.
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