I ported two Koodo numbers this week. The first time I lost service because I didn't do it correctly. I did the self porting as some suggest, the porting terminated my Koodo service but cut off the Public Service (that I had verified as being in existence). I think this is likely because both are through the Telus system and so when you identify the device and terminate the service it cuts off all service through their system. I then messaged a moderator and the service on my old number was ported to Public overnight.
Here is how you need to do it to ensure that you don't lose service.
1) Get your new Public SIM card and go online, create an account and authorize the SIM.
2) When you get to the part about creating a new number DO IT, create a new number for your SIM and go through the process. After you select a plan and if you do auto pay you will have service on the new number that you selected when you complete the registration and authorization procedure.
3) Once you have created your self serve account you can back out and now you need to create an account to join "the community" in order to message a moderator. There is a link to the community at the bottom of the page.
4) When you have set up a new community account go in there and at the top right there is an icon of an envelope, click on that and then look for the orange "create message" icon.
5) Create a message and address it to "moderator team", for subject I put "port of Koodo number" the give them the details of the old number that you want to port along with your "new" number (from Public) and your phone's IMEI number which you can get by dialing *#06# on the telephone keypad and include a contact number where you can be reached. My phone has two IMEI numbers as it has two SIM slots, I gave them both.
Several people have suggested using the self-service change number feature, this may work for other providers but it did not work for me changing the Koodo number - but if you are adventurous go ahead - try it.
