As we know:
Just thinking (not knowing) loudly: what if there (Asia-Pacific Telecommunity) is mandatory (or otherwise not eligible for the official certification) for any handset to support both 3G (UMTS) bands within the very same modem: 3G 850MHz (B5) and 3G 900MHz (B8)? IMO, @36w4r6, @deedend and @zero should understand this much better than I do. Note: 3G support on 2100MHz (B1) might already be obsolete.
Current Thales Group company’s mPLS8-US variant brings:
3G (UMTS): 1900(B2), 1700 AWS (B4) and 850(B5) MHz,
and mPLS8-E variant brings with it:
3G (UMTS): 900(B8), 1800(B3) and 2100(B1) MHz.
As of now, on 3G wireless voice telephony (besides having VoLTE support), to me looks like that only Quectel EM06-E and EM12-G are eligible to be used in Australia. On the other side those two Quectel M.2 modems are not supporting 2G GSM voice fallback (CSFB), that, for example, counts here in Germany**. Is BM818-T1 already considered to be ACMA certified for use in Australia as “the only possible” M.2 “modem that could do the job”? Would be nice if answer might sound like this: “Right now, we are pursuing the RCM mark for Australia.”
This is just some kind of self-thought, liking to point out to LTE Carrier Aggregation (like 5A-28A or 8A-28A), liking to learn more about, perhaps nothing serious from my side.
**P.S. Comparatively to 3G frequencies, mPLS8-US variant brings:
2G (GSM): 850(B5), 900(B8), 1800(B3) and 1900(B2) MHz,
and mPLS8-E variant brings:
2G (GSM): 900(B8) and 1800(B3) MHz. This is, for example, required/needed frequencies feature within Germany until 31.12.2033.