Why is my Samsung SCH-R640 Cell Phone so hot?
If your Samsung Cell Phone is hot to the touch, especially when using several applications at once, this is normal and shouldn't affect your phone’s lifespan or performance.
What to do if Samsung SCH-R640 battery won't charge?
If your Samsung Cell Phone battery isn't charging properly, or if the phone sometimes turns off, the battery terminals may be dirty. Wipe both gold-colored contacts with a clean, soft cloth and try charging the battery again. If the battery still won't charge completely, replace it with a new one after properly disposing of the old battery.
Why does my Samsung SCH-R640 say 'Network unavailable'?
If your Samsung Cell Phone displays 'Network unavailable' or 'Network error,' it might be because you are in an area with weak signals or poor reception. Try moving to another area and try again. Also, remember that some options require a subscription, so contact your service provider for details.
Why can't anyone hear me on my Samsung SCH-R640 Cell Phone?
If another caller can't hear you speaking on your Samsung Cell Phone, make sure you're not covering the built-in microphone and that it's close to your mouth. If you're using a headset, ensure it's properly connected.
Why can't people reach me on my Samsung SCH-R640?
If another caller cannot reach you on your Samsung Cell Phone, first ensure that your phone is turned on and that you have accessed the right cellular network. Also, check that you have not set call barring for the phone number.
Why won't my Samsung SCH-R640 dial the number?
If you enter a number on your Samsung Cell Phone, but the call is not dialed, first ensure that you have pressed the Dial key. Also, make sure that you have accessed the right cellular network and that you have not set call barring for the phone number.
Why does my Samsung Cell Phone ask for a PIN?
When using your Samsung Cell Phone for the first time, or if the PIN requirement is enabled, you must enter the PIN supplied with the SIM card. You can disable this feature by using the PIN lock menu.
What to do if my Samsung Cell Phone asks for PUK?
Your Samsung Cell Phone SIM card is blocked, usually because you entered your PIN incorrectly several times. You must enter the PUK supplied by your service provider.
General| Model | SCH-R640 |
|---|---|
| Network Technology | CDMA / EvDO |
| 2G bands | CDMA 800 / 1900 |
| 3G bands | CDMA2000 1xEV-DO |
| GPRS | No |
| EDGE | No |
| SIM | Mini-SIM |
| Call records | Yes |
| Video | Yes |
| Loudspeaker | Yes |
| WLAN | No |
| GPS | No |
| Radio | No |
| Browser | WAP 2.0/xHTML |
| Games | Yes |
| Java | Yes, MIDP 2.0 |
| Alert types | Vibration, MP3 ringtones |
| Bluetooth | 2.1, A2DP |
| Messaging | SMS, MMS, Email |
| Battery | Li-Ion 1000 mAh battery |
| Colors | Black |
Provides instructions on how to charge the phone's rechargeable Li-Ion battery using the travel adapter.
Details how to use the QWERTY keypad and special function keys for text input.
Provides step-by-step instructions for initiating calls using the dialer or QWERTY keypad.
Explains how to answer incoming calls using different methods like sliding open or pressing any key.
Details managing contacts, including storage limits, number of entries, and assigning Speed Dial.
Instructions for composing and sending text messages, including message options and symbols.
Details how the phone notifies users of new text messages and available options for viewing.
Introduces how to use the phone's built-in camera to take digital pictures.
Guides on adjusting default camera settings like shooting mode, effects, and resolution.
Information on RF exposure from wireless phones and research findings on health effects.
Important guidelines and warnings for the proper handling, use, and disposal of phone batteries.
Instructions on making emergency calls and important considerations for reliable communication.
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