Ok Gavaudan…what would be the proper way to close the terminal without completely swiping the page up then swiping up again and shutting down terminal?
On the phone, what you describe is the easiest way to do that.
yeah…I typed in command againafter a short time message across screen said “command successful” then slid screen into backround and hit modem kill switch. A little while I turned modem back on and restarted phone. Still Nothing. No receive or make calls. Nudda.Nuttin.Gonna send it back. I`d rather Purism mess with it. Thanks Gavaudan
With the “command successful” response from the modem, I’d bet the modem is good to go now for VoLTE, and the issue is with something else. But the issue could be with a different setting, or with AT&T. Again, this is just a hunch, but I’d say it’s worth a last tinker with the easier to change settings. Mine is still working with PureTalk, on AT&T backbone, but maybe they are less restrictive with the phones on the MVNOs.
So the settings I’d look at are under the Settings -> Mobile. On mine the following works:
Mobile Data On
Data Roaming Off
Network Mode 4G Only
Network Pure Talk [of course yours will be AT&T or something]
Access Point: RESELLER (under the name Pure talk, again, yours will be att or something here)
SIM Lock Disabled
Modem Details is just informative, but I’m curious if yours says “lte” under network type.
In the end, I’m glad you took the leap and gave it a shot. I know it’s tough to convince yourself it’s a good idea.
Thank you Nate for all your welcomed input! Ive just repackaged up the phone and tomorrow itll be on its way back to Purism. Im an old guy who bought into the whole privacy phone thing.Mostly I wanted to be able to use it for crypto in a way the apple phone uses its phone to pay for things.. But I dont have the time or patience to type commands because stuff don`t work. So… thanks again! your post were detailed and informative! Take care!
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All this (typing AT commands over serial lines to a modem) reminded me back to the last century when we used modems to connect to remote UNIX systems 
We used kermit (nowadays ckermit) to do so and I installed it last night just for fun and tested it with the “modem” in the L5:
sudo apt install ckermit
sudo kermit
C-Kermit 9.0.305 OPEN SOURCE: Alpha.02, 19 Sep 2020, for Linux+SSL+KRB5 (64-bit)
Copyright (C) 1985, 2020,
Trustees of Columbia University in the City of New York.
Type ? or HELP for help.
(/home/purism/) C-Kermit>set escap 21
(/home/purism/) C-Kermit>set line /dev/ttyUSB3
(/home/purism/) C-Kermit>set carrier-watch off
(/home/purism/) C-Kermit>connect
Connecting to /dev/ttyUSB3, speed 9600
Escape character: Ctrl-U (ASCII 21, NAK): enabled
Type the escape character followed by C to get back,
or followed by ? to see other options.
----------------------------------------------------
ate
OK
(now I typed Ctrl-U C to get back to kermit's command level)
(Back at pureos)
----------------------------------------------------
(/home/purism/) C-Kermit>quit
Closing /dev/ttyUSB3...OK
purism@pureos:~$
The three init commands set .... can be stored in a file ~/.kermrc and you just can forget them.
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I’m using minicom on my Librem 5 instead. The basic idea is the same. (‘Escape’ is Ctrl+A.)
awesome thanks for charing ill try to set the VoLTE setting with kermit 8) didnt seem to take with the other method for me.
Generates error unfortunately on entering second line:
AT+CGDCONT=2,“IPV4V6”,“ims”
ERROR
Watch out for so-called “smart quotes” v. “straight quotes”. I would be 90% sure that any modem would want straight quotes but your post has the former.
The previous paragraph contains smart quotes. Here is a straight quote: "
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