One of the major drawbacks of the OnePlus lineup is that the phones have been built to work on GSM networks only. This means that phones released by OnePlus in the past have not worked on Sprint and Verizon here in the USA. That eliminates a major part of the US market.
The OnePlus 6T will be officially announced on October 29. One thing I am hoping to see is CDMA compatibility. PCMag is reporting that the OnePlus 6T might work on Verizon! The 6T will most likely be LTE only. The phone will support Band 13 for Verizon which has been missing in previous devices. Verizon is apparently currently working on certifying OnePlus’s new device. Hopefully if Verizon can get it certified we will see the 6T gain a bit more traction here in the USA, and who knows maybe OnePlus will be able to ink out a carrier deal for next year.