I tend to agree with you there but I don't know for sure, I don't expect you to know either. I saw in the filmAny nuclear strike anywhere in the world is most likely going to screw up the internet to some degree, and it will certainly wipe millions of mobiles in the general area of its detonation.
"the day after" about a nuclear bomb going off, that the electricity went out in car dash boards and other mains and battery systems. I wonder how would the initial explosion effect the electricity in the area? I don't expect anyone to know, but someone might. I missed part of the film when two gay men started at it in the seat to my right and I could not look forward and sideways at the same time.