CME 4.2.0 running on 3825 router

[@Syed]

Dear All,

I have CME 4.2.0 running on 3825 router, I know this is a bit old version of CME. I would like to upgrade IOS of this router so to have a latest CME version and I can register 88xx phones.

See 'show version' output below and suggest a suitable version, please.

CCME#show version

Cisco IOS Software, 3800 Software (C3825-IPVOICEK9-M), Version 12.4(11)XW2, RELE

ASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Mon 02-Jul-07 23:43 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

CCME uptime is 21 weeks, 36 minutes

System returned to ROM by power-on

System restarted at 08:21:39 GMT Mon Mar 5 2018

System image file is "flash:c3825-ipvoicek9-mz.124-11.XW2.bin"

[@Syed]

Hello All,
Any suggestions, please.

[@Syed]

I've been awaiting for advise, can anybody assist me with this, please.

[@Syed · Accepted solution]

found that is this phone type does not go with 3825 router cause IOS compatibility.