I note from the Sakis log file that SIM card instructs to use "" as service provider name, instead of "vodafone". Is this the problem? Can you suggest any troubleshooting techniques, please?
Due to its length, the Sakis log file is on Pastebin (see https://pastebin.com/QRiyXDyU). My version of Sakis3G is 0.2.0e.
PPPD starts but the interface never goes up, according to the log file.
Using the wvdial.conf file below, I get the following result
The Vodafone APN settings (https://support.vodafone.co.uk/Device-G ... nually.htm) appear to be correct.pi@raspberrypi:~ $ cat /etc/wvdial.conf
[Dialer Defaults]
modem=/dev/ttyAMA0
phone=*99#
apn=pp.vodafone.co.uk
username=wap
password=wap
pi@raspberrypi:~ $
pi@raspberrypi:~ $ sudo wvdial
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
A TZ
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
--> Carrier detected. Waiting for prompt.
--> Connected, but carrier signal lost! Retrying...
--> Sending: ATDT*99#
--> Waiting for carrier.
~[7f]}#@!}!}!} }2}"}&} }*} } }#}$@#}'}"}(}"U[03]~~[7f]}#@!}!}!} }2}"}&} }*} } }#}$@#}'}"}(}"U[03]~~[7f]}#@!}!}!} }2}"}&} }*} } }#}$@#}'}"}(}"U[03]~~[7f]}#@!}!}!} }2}"}&} }*} } }#}$@#}'}"}(}"U[03]~~[7f]}#@!}!}!} }2}"}&} }*} } }#}$@#}'}"}(}"U[03]~^CCaught signal 2: Attempting to exit gracefully...
Other relevant settings:
The file /boot/config.txt contains the following setting, but commenting out the line makes no difference (i.e. UART does not seem to be part of the issue?):pi@raspberrypi:~ $ cat /boot/cmdline.txt
dwc_otg.lpm_enable=0 root=PARTUUID=f36908ff-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
enable_uart=1