>
> I've managed to get the above error fixed with some other changes which I 
> will document on my blog once everything is working.
>

The issue I now have is that pppd is starting but I see this in the logcat 


D/use-Rlog/RLOG-RIL_SIMCOM(  136): PPPd started
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 14 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 13 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 12 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 11 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 10 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 9 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 8 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 7 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 6 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 5 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 4 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 3 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 2 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 1 times after 2 seconds
W/use-Rlog/RLOG-RIL_SIMCOM(  136): Can not detect PPP state in /sys/class/
net/ppp0/operstate. Will retry 0 times after 2 seconds
D/AT      (  136): AT< NO CARRIER


I found a similar question about this on this group and it mentions making 
sure that PPP is included in the kernel build, which it is.

Is there something else I can check into? I am going to see if I can enable 
the PPP debug output to see if I can spot why this is not working. The same 
module under Ubuntu 16 works and dials up so I know the hardware is OK.

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