RM520N-GL: whether firmware upgrade is possible

Hello,

I recently purchased a few RM520N-GL modules, but since they do not match the firmware version I have been using, I am considering an upgrade. However, I am concerned that potential issues might arise because the baselines appear to be different. I am carefully considering the upgrade because I do not even have a tool for QCN backup due to licensing issues.

Could you confirm whether it is safe to proceed with a firmware upgrade to the version specified below using QFirehose or QFlash? If it is possible, could you also provide the tools necessary to perform a multi-download?

Current versions: RM520NGLAAR03A01M4G_A0.300.A0.300

Target versions: RM520NGLAAR03A02M4G_KR_01.200.01.200

I would also like you to explain the meaning of the version naming if possible.

Thanks.