Apparently, T-Mobile's recent greedy and anti-Un-carrier policies, along with moves from other carriers, have forced them to run another ( more numbers game). This time, the $400 is not a combination of Costco and T-Mobile rebates, instead, it is a single $300 or $400 virtual prepaid card from T-Mobile when you port your number over from the competition.
The Essentials plan ($100 plus taxes) will give you $300 per line. The 4-line plan for $170 will give you $400 per line for up to 4 lines, that is essentially 8 to 9 months of free service. And if you are able to snag an Insider Discount, it's an even better deal.
This deal also also stacks with the Keep & Switch promo. This is T-Mobile's standard switching promo that offers up to $800 back via rebate card to offset paying off your existing phone from your previous carrier.
ā
This promo came last night, and as of right now, it seems Costco is still running its separate promotion. I am not sure if someone can get this T-Mobile promotion plus the $250 of the costco cash card, which would have made this deal a killer deal, but as of right now, it is not the case.
https://www.t-mobile.com/cell-pho...F83A546511
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!
56 Comments
Sign up for a Slickdeals account to remove this ad.
So will T-Mobile give me money for switching? I'm okay with free money! But I will draw the line at sending them any money.
Can you add new lines to the account before switching so I can port over 4 lines and qualify for the max rebates?
Does T-Mobile require the lines to have been active for a certain amount of time before porting in? And after receiving the BYOD rebates, is there a minimum amount of time I need to keep those lines active on T-Mobile to avoid losing the promo or having it clawed back?
Thanks!
Also, according to T-mobile, Starting July 9, 2026, Keep and Switch is open only to brand-new customer accounts. I have a tmobile prepaid line and an old fathered tablet line, does it matter?
Sign up for a Slickdeals account to remove this ad.
Prepaids are not real customers, but your tablet line is probably a proper (postpaid) account and by definition an existing customer.
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!