[cisco-voip] Most compatible/stable phone firmware version for CallManager 4.2(3)

[Syed Khalid Ali]

group,
what latest release/version is most compatible and stable with CallManager.

I am running:
CCM 4.2(3)
CRS 4.0(4)

Also what default version ships with this version of CallManager

-- 
Thanks,
Syed Khalid Ali
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