On closer inspection, these accusations all fall apart!
> Other allegations include a Huawei staffer creeping around a trade show in the middle of night and removing covers from networking gear in order to photograph the circuitry inside.
This sounds like something to someone who doesn't have a clue of today's technology. It would have worked in the 70's or 80's, maybe. Today, those circuits come on boards with several layers. A photograph from the top, typically, doesn't give you much.
> Another engineer is accused of sneaking into a rival firm’s lab in order to pinch a robot arm used for testing mobile phones. The robo-arm was measured and photographed before being returned, the US claims.
This is the old Telekom accusation. A German tech-media site (Heise) commented on this, that they had built such a device themselves with little trouble. Students can do this in a few days. The accusations are ridiculous.