Hi Ammar,
I am thinking that this is probably a Bug in the phone firmware that was changed during the SR upgrade;
This can be fixed by changing the Phone firmware;
CSCsk38449 Bug Details
7961 (firmware 8.3.2 ) - Corporate Directory screen stays after Dial
Symptom:
In the Corporate Directory, after selecting Dial for one of the Contacts, and
finishing the call, the Corporate Directory with the contact info screen
stays on the phone. In previous version of phone load the behaviour was
different, after Dialling the contact the idle phone screen was returned.
Conditions:
CCM version 4.1(3)sr4d
cmterm-7941_7961-sccp.8-3-2
Workaround:
Selecting Cancel softkey to return to idle phone screen
1st Found-In
8.3(2)
Fixed-In
8.3(3.1)
8.4(0.25)
8.3(3)ES1
Hope this helps!
Rob