"No network" on new UBPorts community edition pinephone

[c0n57an71n]

Thanks in advance for any help!

I just recently received this Pinephone, here in Australia. Phone cannot make/receive calls & SMS, as it does not detect the telco's network - in fact, it clearly says "NO NETWORK". This was the case with the preinstalled version of Ubuntu Touch, and did not improve just now after I tried an updated version of UT I downloaded from UBports on 2nd Sept (#76, I think), and I followed UBPorts' directions for flashing the SD card.

Other things I've tried / checked:
Turning phone on / off
re-seating SIM card
SIM card works fine in another handset
DIP switches on the back of the phone are all in the 'up' position (I haven't touched them at all)

Any ideas?

Thanks,
Ken.
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