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I have two different modems, what are the step by step instructions to upgrade to the following firmwares?
1. C819HG-4G-V-K9 modems to 15.3(3)M6
2. C819HG-LTE-MNA-K9 modem to 15.6(3)MR2
Any documentation and help is appreciated.
Thank you for your help. The instructions you provided, how do they fit with the information from the link that you sent? This link http://smallbusiness.chron.com/upgrade-firmware-cisco-routers-50238.html ?
Is this the correct firmware download link?
https://software.cisco.com/download/release.html?mdfid=283823528&flowid=60556&softwareid=280805680&release=15.4.3M8&relind=AVAILABLE&rellifecycle=MD&reltype=latest
