** Copied from a fellow member around here **
Call at – 0016139444000
select 1 for English
then 1 for foreign affair
2 for immigration
call is being transferred to cic
then 1 for English
2 for status
1 for PR
8 digit client id number will be asked
listen the request 3 times without entering client id number
then the call is automatically transferred to an agent
agent will ask information about last name, first name, date of birth, application received date, email id etc
then agent will check in the system and shall give feedback regarding UCI.
NOTE: Please don't directly ask for the application status, just tell them you have been waiting for more than 10 weeks, but there is still no update, And you also tried to send email to CIC but did not get response. Therefore, you are calling for getting your client id number so that you can check your application online by yourself.
Hope this can help you to get the UCI. Good luck and keep trying till you get the UCI.