same phone model accept different firmware

[Pointbreak]

Scenario is 

2 phones[both 8831] registered with same call manager accepting different firmwares. If i try the latest with the other one it fails. Only difference is both phones connected to different switches. DHCP is the same, TFTP server the same. In the switch i verified both mab asnd dotx running for the interfaces.

Any quick help here

[Suresh Hudda]

Try to remove ITL/CTL file form affected phone or do factory reset and then check once.

Suresh

[Les Pruden]

Hi -

Can you let us know what version of CUCM you are running?  Also, what are the working / not working versions of firmware on the 8831's?  There is a mid step firmware you might have to upgrade the non-working 8831 to before moving to the most current version.

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