OnePlus 6T – $349 directly from OnePlus – Mirror Black – T-Mobile Version – 8 GB RAM + 128 GB Storage – Free shipping

$200 off, great deal in my opinion, I know a few people that have this.
6.41-inch 2340×1080 AMOLED screen. In-display fingerprint screen unlock.
Qualcomm Snapdragon 845 Soc, GPU: Adreno 630.
Rear dual cameras: 20MP+16MP, OIS, 16MP front selfie camera.
Android 10 coming soon.
OnePlus 6T Support Band:
T-Mobile 2/4/5/12/46/66/71
Link: https://www.oneplus.com/oneplus-6t-tmo
You should be able to unlock it after using it for 40 days on T-Mobile although I remember when this came out some people reported that if you got a cool rep on the phone they’d unlock it for you right away, YMMV.
Enjoy!