Re: Network manager auto-upgraded, ppp no longer connects.

["A. F. Cano" <afc shibaya lonestar org>]

On Thu, Jan 19, 2017 at 11:51:05AM -0600, Dan Williams wrote:
> On Wed, 2017-01-18 at 16:36 -0500, A. F. Cano wrote:
> > On Tue, Jan 17, 2017 at 10:52:42AM -0600, Dan Williams wrote:
> > > ...
> > > Ok good, this helps.  It seems we need to be in mode 2 before we
> > > can
> > > get anything useful.  The +CIND response is especially useful,
> > > since we
> > > can see that yours indicates the device has service.
> > >
> > > Also, you you try:
> >
> > From mode 2:
> >
> > > AT+CREG?
> >
> > +CREG: 0,1
> >
> > OK
> >
> > > AT+CREG=?
> >
> > +CREG: (0-1)
> >
> > OK
> >
> > > Thanks!
> > > Dan
> >
> >
> > Thanks for your ongoing help.
>
> Excellent, assuming we can trust the mode=2 CREG response, that means
> you're registered with the network.  CIND also indicates that you have
> service and that you're not roaming.
>
> Is there any chance you can move the phone to a location that has no
> service (a basement, elevator, etc) and check what the result is when

The best I could do was wrap the phone in multiple layers of aluminum
foil and connect that to the ground of a 3-prong AC socket.  The
resistance between the aluminum foil and the screw driver stuck in the
wall (with copper ground wire in between) is about 0.5 ohm.

> the phone isn't registered?  I can sometimes do this by putting the
> laptop and phone into the clothes washing machine in my basement, since
> I don't have a faraday cage lying around :)

With the grounded aluminum foil, this is what I get (from mode 2):

AT+CREG?
+CREG: 0,1

OK
AT+CREG=?
+CREG: (0-1)

OK

This is the same I got without the aluminum foil, so either the aluminum
foil isn't enough, or those commands are useless.  More likely the
former since I can still connect ppp (see below).

AT+CIND
ERROR

The above I hadn't tried without the aluminum foil.  Then I got back to
mode 0 and connected ppp (via pon).  It could do all the steps, got the
local and remote ip addresses and the 2 name servers.  All this with the
phone in a big bundle of grounded aluminum foil.  My improvised faraday
cage is a big failure.

> Dan

Sorry this test didn't provide useful info.

Augustine