Hi,
Tried all below:
1-formatting and reinstalling the IOS according to apple engineer.
2-visiting apple service center where diagnostic was ok (hardware wise my phone is ok as also my phone bought new).
3-restarting where my phone will work roughly for 25 calls or for 3 days only which is not practical solution especially for such expensive phone.
All above and more I did as even changing the phone won't help.
The problem is not from your or my side to fix as it is surely from the latest update from apple where apple has to issue a new update in order to overcome the issue.
You don't know how much that will affect my way or others way of looking to apple as the update before that affected my previous phone (6s) and made restating till formatted the 6s phone, not to mention that battery thing, so now days, updating the phone will fix a problem and cause another which is not right and not acceptable from apple as a leading company in such business.
Again, we need a new update to fix the issue as early as possible, but basically we need acknowledgment from apple that there is an issue and after that only they can start to solve it as in my 6s they've acknowledged the problem and not for the caller id till now.
Thanks to all.