These are the steps I followed in installing the mbn file and I ran into a few errors.
While following the docx which was provided by Quectel support How to add MBN by command.pdf (388.8 KB) , on Step 4, Substep 4 I got an error. While running
at+qflst="RAM:*" it says ERROR the first time, But when I run the same command again it says `OK.
then while loading the mbn file also I get an error “CME 421”.
I checked there is no mention of an ERROR Code 421 in Quectel datasheets