Searched but didn't find this deal. TMobile [t-mobile.com]
Starting January 7th
For a limited time, trade-in an eligible device, add a new line of voice service, and purchase a new Apple iPhone XR, XS, or XS Max to save up to $390 (via rebate and one-time credit, depending on trade-in device) or purchase the Apple iPhone 8, 8 Plus, or X at FRP and save up to $360 (via rebate and one-time credit).
Get this deal
When is this deal available?
January 7, 2019 - TBA
Where can I get this deal?
You can get this deal by visiting the nearest Costco Warehouse to purchase your device.
What do I need to do?
Purchase a new Apple iPhone 8, 8 Plus, X, XR, XS, or XS Max at Full Retail Price during the promo period.
New customers add at least 2 new lines of service and existing customers add at least 1 new line of service on any postpaid T-Mobile voice plan.
Trade in an eligible device in good condition on the same order as your new iPhone device:
Eligible trade-ins for $390 or $360
Apple iPhone 7, 7 Plus, 8, 8 Plus
Samsung Galaxy S8 series, Note8
LG V30, V30+, G7
Eligible trade-ins for $250
Apple iPhone 6s, 6s Plus, 6, 6 Plus
Samsung Galaxy Note5, GS6 series, GS7 series
LG G6, V20
Eligible trade-ins for $150
Apple iPhone 5c, 5, 5s, SE
Samsung GS4 series, GS5 series, Note4
LG G4, G5, V10
Do I need a specific plan?
Not for this one! Any postpaid voice plan is eligible.
Get your rebate
You'll receive a bill credit based on the Fair Market Value of your trade-in, then the remainder offer value as a rebate card.
You'll need to submit a rebate using promo code COSTCO2019APPLE online at T-Mobile Rebates page.
You'll receive your rebate (via virtual Prepaid MasterCard® Card) within 6 - 8 weeks, and you should expect to receive a text message confirming your submission was received. You'll also receive another text message with the virtual card details once you're approved for the offer. Learn more about Submitting and tracking a rebate.
Anything else I should know?
You can't combine this offer and Carrier Freedom or #GetOutoftheRed on the same lines on your account.
Since a new line activation is required for this offer, you can't cancel a line with the intention of activating a new line just to take advantage of this offer. If a line has been canceled within the past 90 days, it must be resumed before you can add a brand-new line to qualify.
Limit of 12 redemptions per account.
This offer's official name is Costco 2019 Q1 Apple Trade In Trade Up.