I am also facing the same problem on my nokia 6610. Seem like the PPP doesn't dial at all. The following is /var/log/messages ... Please help. Thanks.
send (ATQ0V1S100=1^M)
expect (OK)
^M
ATQ0V1S100=1^M^M
ERROR^M
alarm
Failed
abort on (NO CARRIER)
abort on (NO DIALTONE)
abort on (BUSY)
send (at+cgdcont=1,ip,net^M)
expect (OK)
at+cgdcont=1,ip,net^M^M
ERROR^M
SIGTERM