I think a great example is ING (now Tangerine) and they have Orange Key which is unique to each customers, and they use that to refer people to sign up...I think Koodo could do something similar and have that key accessible within the mobile app, would make referral much simpler and easier.
If you know how to use fastboot , you can do it right now with stock image from Google (i just did this last night it takes about 30 minutes to flash and probably 20-30 minutes to read up how to use fastboot if you never used it before), otherwise the best you can do is clear data on Google android...
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