Samsung and
Pixel phones are a safe bet on 5G bands because they license the bands from
Qualcomm and provide a OTA update if they want to due to the sheer size of their production. I highly doubt if
OnePlus would do that due to cost cutting
Pixel for example supports almost all 4G bands. Almost all alternate numbers are there
Bands on Pixel - 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 21, 26, 28, 32, 38, 39, 40, 41