I found something important related to the SMS issue with the newer GL-X3000 firmware.
1. The main problem:
After the router boots, SMS works for a short time and then stops after a few hours because IMS is not registered properly. The IMS APN has no IP.
But if I manually run (on GL GUI) :
AT+CFUN=0
AT+CFUN=1
after the router finishes booting or any time, then IMS registers correctly and SMS works perfectly for many hours (24+ hours). and still continue sms working…
So the issue is with the modem initialization that happens during boot.
2. Difference I noticed between firmware versions:
Starting from firmware 4.4.11, 4.4.12, 4.4.13, the internet connection comes up very quickly after reboot.
But in 4.4.9 and older firmware, the internet starts slowly after reboot.
This makes me think the new firmware starts the modem/QMI connection too fast, before the modem and IMS are fully ready. Because of this early attach, IMS fails and later SMS stops working.
When I run CFUN manually after boot, everything works correctly — this proves initialization timing is the issue.
So May Be the problem is likely:
“Modem attaches to network too early in new firmware → IMS not ready → SMS stops working.”
And also same thing found by @fratermus
@Cathy this information is closest to problem..
Now! i hope this will fix in next release by Gl.inet Team.