My ideal cordless phone would have
- Caller ID
- Headset jack
- Single-push (on/off) Mute button
- Ability for user to insert ?1? in front of caller ID numbers so I can call some people back
- Belt clip
- Speakerphone in handset
- Full duplex speakerphone in handset
- Address book that overrides caller ID strings so I control which names appear
- Big address book
And some subjective things:
- Feels good in hand
- Good microphone (for normal and speakerphone use)
- Good speaker quality
- Good speakerphone quality
I?m leaving out ubiquitous features like redial and number buttons and a screen backlight.