https://wccftech.com/oneplus-6t-officially-sold-through-t-mobile/

The OnePlus currently only sells unlocked models on its website but that could change thanks to the latest carrier deal. Apparently, the upcoming OnePlus 6T will be backed by a major U.S. carrier, and according to the latest information, T-Mobile is going to be the first official network to sell the OnePlus 6T.

Some insiders have revealed that a retail deal is underway between OnePlus and T-Mobile and it is only awaiting technical approval. This means the standard unlocked international version of the OnePlus 6T will be released in October via the official e-store of the company. Reportedly, the phone will retail at $550, which is just a measly $20 higher than the cost of the base version of OnePlus 6, which features 6GB of RAM and 64GB of internal storage. However, these details are not final and may change.