RM502Q-AE Firmware, Dec 30, 2022

I see several past requests for the latest firmware, but the links are now dead
It is presently the end of 2022. What is the latest firmware for the RM502Q-AE?
Where can I download?

Also, I’ve inserted several different SIM cards, some work, some say SIM MISSING
Obviously it’s not a hardware issue. Do I need different firmware to use the module as a hotspot instead of as a phone?

hi,Can you tell me which version you are currently using?