This might be the best deal out there for the Galaxy S9!

Costco is offering quite a deal on the Samsung Galaxy S9. But, it does require a qualified activation on T-Mobile’s network. Get a Samsung Galaxy S9 for $349.99 after $200 in instant savings. Costco is offering other deals on smartphones of up to $750 in savings depending on the device and carrier.

This deal expires March 31! If you’d rather spend less on a smartphone, Clark just got a great deal on a budget-friendly smartphone under $300, and you don’t have to be tied to a specific wireless plan.