To add a bit of that technical info, so no one needs to go look for it. A table comparing all the frequency bands can be found here.
The default Broadmobi modems (from manufacturer’s site):
BM818
This (BM818) does not seem to be an option:
FDD-LTE:B1/B3/B5/B8
TDD-LTE:B34/B38/B39/B40/B41(120M)
HSPA+/WCDMA:B1/B5/B8
CDMA:BC0
GSM/GPRS/EDGE:B3/B8
BM818-E1 [Defaults: Europe]:
FDD-LTE:B1/B2/B3/B5/B7/B8/B20
TDD-LTE:B38/B40/B41(120M)
HSPA+/WCDMA:B1/B2/B5/B8
GSM/GPRS/EDGE:B2/B3/B5/B8
BM818-A1 [Defaults: North-America]:
FDD-LTE:B2/B3/B4/B5/B12/B13/B17/B25/B26/B66
TDD-LTE:B41(200M)
HSPA+/WCDMA:B2/B4/B5
GSM/GPRS/EDGE:B2/B5
BM818-T1 [Defaults: Asia, Australia, New Zealand]:
FDD-LTE:B1/B2/B3/B4/B5/B7/B8/B28/B66
TDD-LTE:B34/B38/B39/B40/B41(200M)
HSPA+/WCDMA:B1/B2/B4/B5/B8
CDMA:BC0
GSM/GPRS/EDGE:B2/B3/B5/B8
The optional additional Thales (formerly Gemalto) modems (from manufacturer’s brochure and other documents on site):
PLS8-E [Europe]:
LTE: B1/B3/B7/B8/B20
3G: B1/B3/B8
2G: 900Mhz/1800Mhz
(Voice Support for LTE via VoLTE (Voice over LTE) and CSFB (circuit-switched fallback))
(33% lower peak transfer rate compared to Broadmobis, DL: max. 100 Mbps)
PLS8-US [North-America]:
LTE: B2/B4/B5/B17
3G: B2/B4/B5
2G 850/900/1800/1900MHz
(Voice Support for LTE via VoLTE (Voice over LTE) and CSFB (circuit-switched fallback))
(33% lower peak transfer rate compared to Broadmobis, DL: max. 100 Mbps)
Versions not offered
PLS8-J:
LTE (1,3,19);
3G (1,19)
PLS8-X:
LTE (13,17,5,4,2);
3G (5,4,2);
2G Quad Band
PLS8-V:
LTE (13,4,2)
Note on South-America based on limited search: BM818 covers bands better. For instance Argentinian, Brazilian, Chilean, Paraguayan and Peruvian networks will benefit more from T1 modem as it covers all the combinations. Bolivian networks on the other hand seem to benefit mostly from A1 modem. If you want to use PLS8-modem, please check first which network you will be using and what bands it has as some operators use bands that are divided between E and A1/US models (often only B4 for LTE).
Note on Africa based on limited search: Algeria, Botswana, Egypt, Ethiopia, Niger, Nigeria, Kenya, Mozambique, Senegal, South-Africa, Tanzania, Zambia, Zimbabwe all have networks that predominantly have B1 band (some B3 and B20 here and there) as well as GSM900Mhz. Therefore the E-models should be the default.
Note on Middle-East based on limited search: Bahrain, Iraq, Israel, Jordan, Kuwait, and Saudi-Arabia (as well as Pakistan and India) may be best served with an E-model modem. Mostly B1 and B3 networks, some B5 and B8 but also B40 in couple of places.
Note on Antarctica based on limited search: No network information found. Ski near the Argentinian base to use GSM or use base wifi (satellite).
List of suggested exceptions to defaults (including any links), provided by users: …
If someone wishes to comment with more information, I’d be happy to update what the other areas default to, or if there are any special cases where the default may not be the best option. Asia, South-America, Africa, Antarctic…? For more on finding out about your network, see here.
This can then be used to make an answer to the FAQ.