Hi Sir, Thanks for your advice. now I got the solution. thanks again.

Hi Sir,"No the 7821 phone CP-7821-K9= does not include Flex-3 or any other form of license." really?Yes i had the exiting working CUCM and i want to add 5 more phones. So here is my CUCM system version: 12.5.1.10000-22.thanks 

Yes Sir, I remain 2 licenses more of UC Manager Enhanced License. and I just want to know, why when I purchase the new phone 7821, does it include the A-FLEX-3? If I don't want to get it (FLEX), my phone will be working well or not? thanks

Yes Sir, If I purchase only items 2 and 2.01 and no need to purchase items from 1 to 1.11, So it will be working or not for calling in local?thanks

Yes Sir, Here is the quotation from my partner. but I wonder why it includes a-flex-3? or nowaday Cisco includes this a-flex-3 when I purchase the Cisco UC Phone 7821? thanks