For whom the bell tolls....

[mbyron]

You didn't mention the rule code, or whether PU verbalized the call.

If no verbalization, I gather that F3 was not affected by the call. For both OBR and FED I would let the change stand. (I don't think the bell has rung until it has rung audibly; in this case we have a feinted ring.)

If he verbalized the call, in FED the ball is dead -- no unringing in this case. In OBR you'd have to judge whether anyone was affected by the call: if so, then again no unringing. Otherwise, game over.