To summarize the problem, I have cisco router CISCO1921/K9 the router software version is 15.3(3)M5 released in 2015
And there is an available version 15.8.3M7 released in 2021
I need to update the device to the last available released version
When I tried to download the update, from Cisco Software Central a massage appeared asking for Service Contract Required
And my router reached their End-of- support and End-of- software and the ios-ips-update licences is not activated
Is it possible to get Service Contract to only download the last available software for the router (version 15.8.3M7 released in 2021) ?
Or because of the End-of- support and End-of- software is not possible any more to get Service Contract for update to the version 15.8.3M7 released in 2021