This past Saturday I took advantage of the Galaxy S9 plus trade-in promotion at Costco....so far everything is working good and I love the phone. I've uploaded my receipt and IMEI proof to the t-mobile.com/promotions website. My question is...where do I send my phone? I was given the info by Costco to go to the website but no address to send in the phone. Any help is appreciated.
Best answer by tmo_chrisView original