EM7455: Restore the APN settings to their original factory defaults without the need to reinstall the firmware

How do I restore the APN settings to their original factory defaults (supplied as a part of PRI file) without the need to reinstall the firmware?

Have you tried at!rmareset

rmarestore returns error

at!rmarestore
ERROR

Have you tried at!rmareset

Thank You!

AT!RMARESET=1 has helped to restore to factory default APN settings.

The only drawback is that it changes the IMPREF to GENERIC.