@alan-zhang said in SIM7080G Module speed and stability:
I've tested the SIM card from a phone and it's 1MB/s download and upload.
Your phone might be using 3g/4g/5g/LTE and not NB-Iot or Cat-M. In fact Ive never seen a phone that uses NB-Iot or Cat-M (Doesn't mean they might not exist though)
M5Stack does sell an LTE module if you want LTE speeds though.