which version is better fro code upgrade

Hi we are going to upgrade code. The current ios is c3825-advipservicesk9-mz.124-22.T5.bin. Which version is latest and most similar feature? Can I say c3825-advipservicesk9 must be same among several version and other number inside the name should be biggest? Thank you
eemoonAsked:
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Brian McDonaldIT ManagerCommented:
c3825-advipservicesk9-mz.124-22.T5.bin

The code version is denoted by the 124-22

IOS release 12.4 version 22

I believe that router is compatible with version 15 code, if you have support from Cisco you can login to smartnet and find the recommended code version.
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atlas_shudderedSr. Network EngineerCommented:
Most current version in the 15.x stream is 15.1.4M12a(MD)

In the 12.x series your latest stable train would be 12.4.15T17(MD)

Note - x800ISR series is EOL
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JustInCaseCommented:
Code version with the least number of bugs that will affect your production device is the best one (even if it has more bugs than some other IOS version).
Number of version and Cisco recommendation is irrelevant. Read - open caveat for IOS version, Cisco Bug Search Tool and Cisco Security Advisories and Alerts that you plan to use will it affect production. Even after checking you can still run into undocumented bugs.
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atlas_shudderedSr. Network EngineerCommented:
Abandoned
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