Samsung SGH-i900 User Manual page 57

Troubleshooting
You forgot a security code, PIN, or
PUK
If you forget or lose this or another code,
contact the seller or your service provider.
Your display shows white lines
The display may show white lines if you
have turned the device on after a long
period of disuse or if you removed the
battery without first turning off the device.
The display should correct itself in a short
time.
You enter a number, but the call is
not dialled
• Ensure that you have pressed [
• Ensure that you have accessed the right
cellular network.
• Ensure that you have not set call barring
for the phone number.
You select a contact to call, but the
call is not dialled
54
• Ensure that the correct number is stored
in the contact information.
• Re-enter and save the number (if
necessary).
Another caller cannot hear you
speaking
• Ensure that you are not blocking the
built-in microphone.
• Move the built-in microphone closer to
your mouth.
• If using a headset, ensure that it is
properly connected.
The sound quality of a call is poor
].
• Ensure that you are not blocking the
internal and bluetooth antenna.
• The internal and bluetooth antenna is
located at the bottom of the device.
• When you are in areas with weak signals,
you may lose reception. Move to another
area and try again.