Re: Is there any proof?
The GCHQ actually already reviewed the Huawei/ZTE equipment some years ago (before the political decision was made to ban the hardware), the head of GCHQ made a rare public address on the issue of possible vulnerabilities and he said there was nothing they saw in their testing to indicate any significant or intentional vulnerabilities in the hardware — there's always a chance they missed something but unlike a lot of hackers you can imagine they had hardware engineers probably comb over this stuff with an electron microscope, for him to go on record with that confidence