Roughly three weeks ago, OnePlus released globally the Lava Red OnePlus 5T. Yesterday, the limited edition variant sold out in North America. It is also out of stock in India.
— OnePlus (@oneplus) February 22, 2018
In all three countries presently,(US, Canada, and India) users can only purchase the Midnight Black variant of the flagship device.
It is not known how many units were available at launch so as to estimate how quickly they sold out. Nevertheless, since it was a limited edition, it was bound to get out of stock sooner or later.
OnePlus may also not produce more units, so we you advise not to keep your hopes up. However, offering a phone in a single color variant doesn’t provide any option for buyers.
There is still a good four months or so before the launch of a successor, so there is a chance we might see yet another color variant before the OnePlus 6 launches.