Assume that local route groups are configured. When an IP phone moves from one device mobility
group to another, which two configuration components are not changed? (Choose two.)

A.
IP subnet

B.
user settings

C.
SRST reference

D.
region

E.
phone button settings

Explanation:
Incorrect answer: ACD

Although the phone may have moved from one subnet to another, the physical location and
associated services have not changed.
Link:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_1_2/ccmfeat/fsdevmob.html#w
p1137460