It's all about license fees. Oneplus needs to pay for each unlocked band, so they made various phone variants with only certain bands unlocked. That can be changed in software, but permanent way is still unknown (every ota resets config to default)If OnePlus is selling the same hardware everywhere, why are they deactivating certain frequencies in certain regions? And why are they saying these are impossible to reactivate in software? That is what they said when asked about the curtailed 5g capabilities of the Indian model.