Thanks @deancs, I might not be going crazy then! I did remember pre-ordering the u270s specifically, as they were then listed as for use with Australia last year. Did Particle switch telco partners for AU?
Particle did not automatically swap my Electrons to u260s on my behalf though.
The frustration is growing – because like what you said, the u270 Electron should work with 900/2100MHz 3G bands, which is what Optus’ 3G network operates on. I popped in an Optus data sim into my u270 Electron, but it wouldn’t connect either – instead of falling back to Listening mode like the Particle SIMs do, the Electron loops between blinking green and pulsing white. For comparison, I get full signal using this same Optus data sim on a USB dongle (the cell tower’s really close, and I’m in the inner suburbs of Melbourne).
The specs below (from ublox) confirms the u270 connects at 3G on the 900/2100MHz bands:
So now I am truly, utterly confused.
The optimum scenario is for me to use the Particle SIM with the Electrons, but my u270s won’t work in AU. However, my pre-order for the Electrons was in December last year, and I recall that the u270 was the recommended model then (and I suppose @deancs’ comment corroborates this?).
Or did I really make a huge mistake then?
Also, if based on the u270 Electron’s support for 900/2100MHz 3G bands, why can’t an Optus data sim work then, especially if Optus’ 3G network are on the 900/2100 bands? (edit: setup.particle.io allows Electron setup using non-Particle SIMs, although this is not exactly advertised – just enter your own SIM’s ICCID)
Any other Aussie folks here who might have tried u270/u260 Electrons with Particle/other data sims?