(EXPIRED) Costco: $300 rebate for T-Mobile when you bring your own device

If you’re a member of Costco, you can get a $300 Costco Shop Card via rebate when you either switch to or add a line to T-Mobile and bring your own device. This does not require porting a number. I think you might be able to stack this with the T-Mobile offer for a buy one, get one free line to get two lines for the price of one and possibly get $300 back on each line, but I recommend doing some more research if you want to try that play.

The Deal

• Costco is offering a $300 Costco Shop Card when you activate a qualifying postpaid T-Mobile line in-warehouse and bring your own device. See this Slickdeals thread for more detail.

 Key Terms

• Valid June 18-24, 2021
• Requires activation of a new postpaid line of service on a compatible GSM phone
• Max 2 per account
• Qualified activation in-warehouse at Wireless Center required
• All Costco Shop Cards via online rebate require submission to MyPromoChoice.com within 30 days of purchase receipt date.
• Allow up to 14 weeks processing.
• All lines must be active and in good standing when rebate is processed.
• See Wireless Center for complete details.
• See this screen shot for more terms.

Quick Thoughts

If you’re looking to add just one T-Mobile line and you already have a phone on which you can activate service, getting a $300 rebate is a nice deal. We periodically see these dals for $200, but $300 is less common.

Last fall, I was able to stack a Costco rebate like this with a T-Mobile free line promotion. I added a line at Costco for free (my plan included taxes in the plan cost, so it didn’t even cost me anything additional in taxes) and I later received a $200 Costco Shop card in the mail. The paperwork at Costco reflected the normal cost of the additional line, but since I opened it during the free line promotion (and I monitored the Slickdeals thread for success reports), I knew that T-Mobile wouldn’t actually charge me for it (and they didn’t).

That’s why I think the current Buy One Line, Get One Line Free deal will probably stack with this. However, I haven’t monitored that thread closely because I’m not looking to add a paid line to my account right now. In other words, you should do your own research to be sure that they stack and that you have a qualifying rate plan. See this Slickdeals thread for research purposes. If they do stack, I think you should be able to add two lines at Costco and bring your own device on each and get two $300 cash cards, only paying for one line. Note that the Costco deal is limited to two per T-Mobile account.

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