I am just adding the detailed procedure I used to get the 'modemmanager
log data' (in case a less experienced user like me is trying to find
it):

0. boot without the modem, wait for the system to fully load

1. open a terminal window and stop network manager: sudo 
/etc/init.d/NetworkManager stop
system responds:  * Stopping network connection manager NetworkManager          
          [ OK ]

2. find the modem-manager process number: ps -A | grep modem
system responds:  2292 ?        00:00:00 modem-manager
where in above example '2292' was the process number

3. kill the modem-manager process: sudo kill 2292
REPLACE 2292 with your results

4. run modem-manager in debug mode: sudo /usr/sbin/modem-manager --debug
system responds some messages and remain there waiting for new triggers:
** Message: Loaded plugin Huawei
** Message: Loaded plugin Option High-Speed
...

5. open a NEW terminal window to start network manager: sudo 
/etc/init.d/NetworkManager start
system responds:  * Starting network connection manager NetworkManager          
 [ OK ]

6. attach modem, wait at least 30 seconds for the full initialization

7. try to connect via network manager icon

8. wait at least 1 minute for the connection and if not established
clisk disconnect

9. disconnect modem

Finally copy paste all data from first terminal window (containing log
data).

Regards,
George 

P.S. I believe that my E169 problem is similar to E220 and I am not
going to open a new 'bug' report

-- 
Mobile Broadband connection not completing ( Huawei E220 )
https://bugs.launchpad.net/bugs/410634
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