RM500U-CN firmware latest for slow LTE issue

Hello, I have RM500U-CN module and need to update - please can you send me the latest firmware?

can please send to me? wilson29@gmail.com
it always cannot perform CA, much slow speed compare with a smart phone on LTE.
Thanks a lot.

ATI
Quectel
RM500U-CN
Revision: RM500UCNAAR01A18M2G

AT+QGMR
RM500UCNAAR01A18M2G_01.001.01.001
AT+CSUB
SubEdition: V01
AT+CGMM
RM500U-CN

Many thanks.

hello @Quectel support team, could you please help?