Latest OS for ISR 4331 K9 Router

[Arijit007]

Hi,

Can someone help me with latest OS for ISR 4331 K9 Router? We are trying to upgrade the existing OS. Need help to know the latest OS version recommended for the router. 

Thanks! 

[marce1000]

 - FYI : https://software.cisco.com/download/home/285018115/type/282046477/release/Bengaluru-17.6.3a

 M.

[balaji.bandi]

First i would ask what is the exiting IOS Code running on the device ? before you go any stable Gold version of IOS XE.

In the production environment for Long i been ruining 17.3.X code its good., anything higher suggest to read release noted and understand any caveats.

also some old version to new version you need to upgrade ROMMON.