7910/7912G/7935 IP Phones

[zulfi]

What is the last supported CUCM release for IP Phones 7910/7912G/7935 ?

Starting 11.5 they are not supported:

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/rel_notes/11_5_1/fieldNotice/cucm_b_fn-deprecated-phone-models-1151.html

[Jaime Valencia]

11.0 is as high as you can go and still use those endpoints, but the development efforts are going to be only for 11.5 going forward. You'll need to either replace them, or lag behind on features and fixes.