How do I eliminate speakerphone echo
From TreoCentral
This issue is discussed in the Speakerphone Echo article, where it states that this echo primarily seems to affect Treo 600 users, more specifically those who call people using a Treo 600.
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A: Treo 600
1) When in a call, turn on speakerphone, turn it off, then turn it on again (e.g., hit the space bar three times) - this workaround is successful on many units.
2) Upgrade the firmware of your Treo to the most recent supported version. Visit PalmOne's upgrade site to download the most recent version.
3) Return your Treo for a replacement. This is the last resort, and you are not guaranteed to receive a replacement that is echo-free.
