How are you determining that it disconnected? Did the icon change or are you running a ping, or some other application attempting to use the network that starts failing?
Also can you:
1. attach the syslog from the device
2. attach the output of /usr/share/ofono/scripts/list-contexts
3. attach the output of /usr/share/ofono/scripts/list-modems
@Jean-Baptiste
Hmmm, this looks different than bug #1426122.
How are you determining that it disconnected? Did the icon change or are you running a ping, or some other application attempting to use the network that starts failing?
Also can you:
1. attach the syslog from the device
2. attach the output of /usr/share/ ofono/scripts/ list-contexts
3. attach the output of /usr/share/ ofono/scripts/ list-modems