Not quite the full story.
Huawei have modified one of their standard modems to Openreach requirements/specifications. If the problem is not evident in their standard product the responsibility would seem to be Openreach's. One has to assume that they performed quality tests on samples, and signed off the product.
As long as the ones in the field conform with the signed-off sample standard then Huawei are in the clear. If they don't, then Openreach are in the clear.
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