have bought a rather fresh A0001, ubports installed smoothly. But when inserted my SIM card just an empty triangle appeared in the status bar, no cellular connection whatsoever. Manual search shows carrier list, selecting any of them (or auto) makes no difference. Tried different SIMs.
Doesn't help moving into the DEV channel.

ofonod just throws several messages into syslog on the SIM card insertion:

Sep  2 12:02:24 ubuntu-phablet ofonod[1701]: Querying PIN authentication state failed
Sep  2 12:02:24 ubuntu-phablet ofonod[1701]: message repeated 3 times: [ Querying PIN authentication state failed]
Sep  2 12:02:25 ubuntu-phablet ofonod[1701]: Requested file structure differs from SIM: 6fb7
Sep  2 12:02:25 ubuntu-phablet ofonod[1701]: ril_file_info_cb: Reply failure: GENERIC_FAILURE
Sep  2 12:02:25 ubuntu-phablet ofonod[1701]: message repeated 2 times: [ ril_file_info_cb: Reply failure: GENERIC_FAILURE]
Sep  2 12:02:25 ubuntu-phablet ofonod[1701]: SMS History Probe for modem: 0xdcad00
Sep  2 12:02:25 ubuntu-phablet ofonod[1701]: Network time: Registered inteface org.ofono.NetworkTime, path /ril_0
Sep  2 12:02:25 ubuntu-phablet NetworkManager[1800]: <info>  [1599040945.9962] (/ril_0): found new ConnectionManager interface
Sep  2 12:02:26 ubuntu-phablet ofonod[1701]: Unable to read waiting messages numbers from SIM
Sep  2 12:02:26 ubuntu-phablet ofonod[1701]: Unable to read mailbox identifies from SIM

Please help!