Are trade-in rebates just a scam?

hangtod wrote:

My service activated thru from Costco wireless in May 1 2022. it's has been passed two months now. Costco wireless also followed up these matter nothing done from T-Mobile. This T-Mobile trade-in are completely scammed. I have two I-Phone 11 traded in with excellent condition package with my original boxes packed with bigger box. I have took all the pictures before and after sealed the box to ship. I have received a Texted messages from them said my I-phone 11 have issues. Did not explain what it was. Downgrade my trade in value to $175. I have all the proofs that my two I-Phone are excellent connections. This is totally Scammed Trade-in from T-Mobile. Anyone would files class actions count me in. 

Just to be clear, you are saying you received $175 trade in credit for your iPhones? Also are you getting any monthly credits applied to the monthly payment of your new phone?

If the answer to both questions is yes, the your total of $175 one time credit plus the total of your monthly credits (usually 24 payments) should equal the total trade in credit you were promised.