I seem to be having a problem where after an incoming or outgoing call
connects to my mobile there is a delay of approximately 15 seconds or so
before the other party can hear me. The other party is on a Telstra
fixed line service who usually calls me via Agile's call service. (I
don't know who Agile uses to complete the call). I am on Vodafone
pre-paid and call them directly.

Can anyone suggest whether this might be a handset (Motorola C350) or
network problem or whether they have seen this before.

I make and receive far fewer calls from other parties and don't have a
lot of data to assist with a diagnosis, but FWIW I haven't noticed the
problem with others but there's not a lot of data to go by and possibly
the majority would be on mobile services.

Thanks,

D.