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Is it possible to rollback to T-mobile from H2OS?

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New member
Jun 16, 2021
I got an OP7T from others with sim network locked. BL is unlocked and now it is flashed into chinese OP firmware H2OS. I want to covert back to T-mobile version and try to unlock sim network lock. How can I do that? Is it possbile to do that?
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