I’m getting about 45Mbps down and 25~30Mbps up with external 10db antennas…if they are accurate in their description.
Best deal I’ve found:
https://www.amazon.com/gp/product/B078SKSQVL
Uploads were significantly improved with an extra antenna (+2x). The built in antenna is not MIMO, so it will struggle with weaker signals.
Make sure it’s in QMI mode, and not USB. USB never did more than 15~20Mbps for me, even with good external antennas.
In my experience, if the interface says 3g-modem (or tty anywhere), it’s not configured for max speed. Also, I have 4 brands of antennas…they are all close, but the ones I linked benchmark the fastest and are the cheapest, by far.