@Thao10 you want a brand new phone number on a single PM account? Or you have two PM accounts and want to swap the phone numbers between the two?
If the first option, then don't choose "Select a new phone number" when you get to the Change Phone Number page, insead of clicking on "Transfer a wireless or wireline number from Public Mobile or another provider".
If the second option, you'll definitely have to reach out to the moderators via private message for assistance, but I believe it is not possible.
No, its not the case.
I current have a number with MP and i want to change to another one with MP also.
If you are simply trying to switch to a new number from PM's available number pool, then in the Change Number page, you would choose "Select a new phone number", not "Transfer a wireless or wireline number from Public Mobile or another provider". The second option is where you are getting the Check Eligibility test, and is unnecessary if you are getting an entirely new number.
how do i choose the number i want it in the available number pool?
Just to be clear, the numbers offered through the number pool will be random and completely unrelated to the phone number you had with Rogers. To get a number from PM's number pool, choose "Select a new phone number", then select the province/city. The selector will only show you 5 random phone numbers at a time based on your city. If you don't like any of these, you can refresh the choices by selecting a different city, then going back to the city you want. When you find one you like, highlight it and click submit. If you are picky about your phone number, it is admittedly a time-consuming process with limited choices, unfortunately. Be sure you really want that number, because you can only change your phone number once every 30 days with PM.