[Linphone-users] Linphone 3.4.1 on iPhone disconnects on standby

[David]

Hey all!

A friend of my installed "SIP Fone" on his Apple iPhone, it looks like 
it's actually Linphone 3.4.1.

As soon as his phone goes into standby, the phone stops responding to 
the server. I did some packet tracing, the server is sending an OPTION 
packet every 15 seconds and the phone is answering with an OK.

Trouble is when the phone goes into standby, it stops answering the 
OPTION packets, it doesn't answer INVITE either. When the phone comes 
back out of standby, it registers again as it if were a brand new 
connection.

What's weird is both skype and cell phone calls ring through, but the 
SIP Fone stops working as soon as it goes into standby.

( Standby might be the wrong word, it goes into this mode when he 
doesn't use the phone for a while or press the small button on the top 
of the phone ).

What do I do?

Thanks,

David