Still working on this as time permits. Figured I would continue to document my quest here.
Tonight just for kicks I tried an AT&T prepaid SIM (new, never been in another phone). It instantly registered on the AT&T network, shows 4G LTE network. And I got a text message inviting me to register my new service.
mmcli -m 1 --3gpp-scan --timeout=300 shows AT&T as current each time I run the command. No errors. Interestingly it does not show PureTalk network as available (just 312, 311, T-mobile, T-mobile, Verizon, FirstNet, and AT&T).
Tried another Puretalk SIM (different than previous, already active in an Apple device). Same behavior previously observed, really the only difference I saw was that each time I ran the command mmcli -m 1 --3gpp-scan --timeout=300 I got the list of available carriers (no error messages like I got previously). (list of networks 312, 311, T-mobile, Puretalk, Verizon, FirstNet, and AT&T).
I think my next path is to investigate if the APN is being set correctly and or try as many different PureTalk/AT&T APN settings I can find and test.
Tonight just for kicks I tried an AT&T prepaid SIM (new, never been in another phone). It instantly registered on the AT&T network, shows 4G LTE network. And I got a text message inviting me to register my new service.
mmcli -m 1 --3gpp-scan --timeout=300 shows AT&T as current each time I run the command. No errors. Interestingly it does not show PureTalk network as available (just 312, 311, T-mobile, T-mobile, Verizon, FirstNet, and AT&T).
Tried another Puretalk SIM (different than previous, already active in an Apple device). Same behavior previously observed, really the only difference I saw was that each time I ran the command mmcli -m 1 --3gpp-scan --timeout=300 I got the list of available carriers (no error messages like I got previously). (list of networks 312, 311, T-mobile, Puretalk, Verizon, FirstNet, and AT&T).
I think my next path is to investigate if the APN is being set correctly and or try as many different PureTalk/AT&T APN settings I can find and test.