Just would like to clarify here. Can you please correct me if I’m wrong about the difference or caution to take when deciding which model to go - 3G version or 4G/LTE version. Base on specification, the following are the supported frequency bands. I am after and interested between the 3G model vs the 4G modem when it is falling back to 3G. Note that I am basing this with the worldwide hardware version.
4G LTE : (800/900/1800/2100/2600 MHz) then when this modem falls back to 3G, it supports the below:
Fall back to 3G : UMTS/WCDMA/HSPA+ (900/2100 MHz)
Take note with fall back 3G, only 900 and 2100 MHz bands are supported.
versus the 3G model below.
3G : UMTS/HSDPA/HSUPA (800/850/900/1900/2100 MHz); EDGE/GPRS/GSM (850/900/1800/1900 MHz)
Probably this could be a very good reason why you should go with 3G version when you know that there is no good 4G coverage in your area.