T-Mobile will give you a free Galaxy S21 and $200 credits.

Now the Galaxy S21 is launched, the telecom providers have started giving away a free Galaxy S21 the moment you sign up with their plans. This also includes $200 Samsung store credits as well. Please note that this is a limited time offer from T-Mobile.

Moreover, you will also get up to $800 trade-in values of your eligible devices – on pre-order.

Customers can pre-order the new Samsung Galaxy S21 5G today and get it free with eligible trade in. Experience the newest Galaxy phone on the 5G leader in coverage.
— T-Mobile (@TMobile) January 14, 2021

To get that juicy $800 trade-in value, all you have to do is own a device from the following list.

Apple: iPhone 11 series, X, XR, and XS series.
Samsung: S10 series, S20 Series, Note 20 Series, S20 FE, Note 10 Series, S9 series, Note 9 Series.
Google: Pixel 4a series, and Pixel 4 series.
OnePlus: 8T+, 8 5G, 7T Pro.
LG: V60, Velvet and Wing.

Other devices like iPhone 8, LG V50, S8, OnePlus 7 will get you up to $400 off, whereas iPhone 7, S7, S6, Pixel 2, OnePlus 6 or LG V40 will let you have around $200 off.

However, you need to make sure the devices should be in proper working condition, and should not have any cracks, or broken areas such as broken front or back glass for a full $800/$400/$200 off on your new purchase. All you have to do is trade-in your device, sign up for a 24-month plan, and walk out with a (free) Galaxy S21.

Moreover, T-Mobile is also providing additional $200 credits for Samsung Store, only when you pre-order Galaxy S21 Ultra. For S21 Plus, you get $150 credits and for S21, you get $100, which will help you to buy the Galaxy Buds Pro from Samsung Store, or any case or S-Pen for the S21 Ultra.

Source: Android Central