Hello, where to get latest AT commands for this model as well as carrier agreggation and latest firmware.
I have RM521FGLEAR05A01M4G version.
Thanks.
Hello @plawxr , please contact @Akso.xie or @eddy - They are the administrators, and will gladly assist you. Thanks
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sorry for late reply,Akso. ​Xie and Eddy aren’t in charge of the forums category. Each section has corresponding technical moderator responsible. Due to the large number of posts, they need time to reply. Please be patient,
thank you for your understanding. 
@Louis.Huang-Q hi louis, please help support this issue, many thanks~
Hi @plawxr
We are not allowed to share documents on this forum, you might have to contact your sales agent for getting docuemnts or firmwares. This forum is for technical topic discussion.
Btw, what do you mean by “carrier agreggation”? This is just the term of a technology in LTE and 5G.
BR,
Louis
I mean ENDC combinations.
Hi,
ENDC combination has not been archived. Which combinations you would like to confirm? we will help you to confirm accordingly.
BR,
Louis