Kyocera 2100 SERIES User Manual page 43

• The earpiece and ringer volume settings are high. To adjust the earpiece
volume, see "To adjust the volume manually" on page 13. To adjust the
ringer volume, select Settings → Sounds → Ringer Volume , and press
left to lower the volume.
• Check how often voicemail notifications, pages, and text messages are
received, and how quickly they are acknowledged. To use power most
efficiently, acknowledge notifications and messages promptly after
receiving them.
User's Guide for the Kyocera 2235 Phone 23