Echo issue on OM2008.08 solved

[Daniel Selinger]

Clean install off OM2008.08-update + opkg upgrade (no updates as the
newest image flashed).

Installed you package with -force-downgrade. 
"strings libficgta01vendor.so | grep N0187" prints out the desired AT
command, so it's the right lib for sure.

Switched of the phone. Booted it up. Prevented it from going to
suspend, just to be sure nothing reinits the calypso.

Echo still persists as before.

:/