The T-Mobile version is ideal for people who will use the phone stock no root and will rely on T-Mobile software updates. The device is locked down. While they do offer you $300 for old devices which is an awesome deal you are getting a crippled device and you will be settling. No pun intended.
IF YOU CARE ABOUT ROOT, KERNELS, TWEAKS & FULL CONTROL OF YOUR DEVICE AND A WARRANTY AFTER YOU UNLOCK YOUR BOOTLOADER....ORDER DIRECTLY FROM ONEPLUS.
YOU WILL NOT BE ABLE TO CONVERT OR FLASH ANY ROM TO THE T-MOBILE VARIANT TO CONVERT IT TO THE TRULY UNLOCKED VERSION
*** THE T-MOBILE VERSION DOES NOT SUPPORT DUAL SIM FUNCTIONALITY; EVEN THOUGH IT LOOKS LIKE IT'S THERE AND WILL WORK IT WILL NOT BE SUPPORTED BY T-MOBILE. THEY WILL NOT ASSIGN A 2ND IMEI # TO THE DEVICE TO USE A 2ND SIM ON THEIR NETWORK ***
I bought the device from the event and was told it was the “unlocked version” because I purchased outright only to get a T-Mobile boot animation, T-Mobile sounds, preinstalled apps, and a locked down bootloader only too late to return because I left NY to head back home. I got it sim unlocked via 611 which also un-greyed the oem unlock option. You then have to fill out a form and get an unlock token like the old HTC days. That takes 7 days to get the .bin file via email that allows you to bootloader unlock your phone. Not worth the time and run around.
Also think about this for those that purchase their phones outright. T-Mobile is charging $580 for the 8/128 after taxes etc you will be close to the 8/256 model that Oneplus is offering directly also depending on where you live and your tax percent rate. You can get that model (8/256) from Oneplus plus free shipping etc not to mention it’s unlocked how it should be with dual sim and the faster software updates.
Read the fine print from T-Mobile. Make your decision based on your needs.
Lastly at the event Oneplus showed the following prices: $549 for 6/128, $579 for 8/128 and $629 for 8/256. Get to the T-Mobile pop-up and the T-Mobile reps come out and tell everyone around 4:30pm that there are 2 models available...The T-Mobile version for $580+tax which is the 8/128 Jet Black and the "Unlocked" version Midnight Black for $620+tax....mind you NY tax is 8.8% i think. That was an argument all in itself.
Here are some pics of my T-Mobile Oneplus 6T that I picked up and will more than likely return.
Last pic is me trying to unlock the bootloader but it asks for an unlock token in which you need the form to move forward to do so.