I encountered few problems using Nokia's UDP implementation when there are NATs around so I would recommend you to use TCP. Maybe recent versions have solved this issue but you can find older implementations on the field...
Regarding reliability and batery life I would say TCP is more reliable by itself and you will avoid UDP's retransmissions which can safe some batery if the server does not respond fast or there's a problem in the link.
hope it helps,
sam
2007/11/12, lu <luzango.mfupe@tuune.mobi>:
Hi,
I came accros one Nokia-S60 Guideline regarding SIP setting in the
NAT/Firewall traversal section which say:"It is recommended to use TCP
as the transport instead of UDP since even doubled battery life can be
achieved with a UI always connected to a SIP service".
I need OPenSER users to comment on this since what i know is that UDP is
more reliable transportation.
WBR
lu.
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