Samsung A420 - Manual (Page 152)

136 Section 4A: Important Safety Information
Getting the Best Hearing Device Experience With
Sprint PCS Vision Phone A420 by Samsung®
To further minimize interference:
Ⅲ There is usually less interference on the microphone setting
than the telecoil setting.
Ⅲ Set the phone’s Display and Keypad backlight settings to
ensure the minimum time interval:
1.
Press Menu > Settings > Display > Backlight.
2.
Select Main Display or Keypad and press .
3.
Select the minimum time setting (8 seconds) and press .
Ⅲ Use phones with a pull-out antenna. Phones with embedded
antennae may produce more interference.
Ⅲ Position the phone so the antenna is farthest from your
hearing aid.
Ⅲ Move the phone around to find the point with least
interference.