> because Russia needed time to update glonass satellites.
Why is this? As leap seconds don’t occur on a regular frequency, I assume they are not hardcoded on the software or hardware on board, but the control centre uploads them on the satellites enough in advance once they have been scheduled. So why can’t the control centre just stop sending those updates?
Not saying this is the case of Roomba, but often devices need 24/7 Internet connectivity so that their manufacturers can sell traffic through their owner’s network.
I often fly from Milan Malpensa airport, and I’ve noticed there are two separate security areas: one for people flying to the US or Israel, and one for everyone else. I’d always wondered why this was the case, and now I get it.
Another manufacturer of regional aircraft with a significant market share is ATR, though it makes turboprop airliners, so not exactly the same category as Airbus A220 and Embraer E-Jet.
I would rule out the possibility that the listening device is a smartphone, as the battery would last only a few days even with the most conservative energy saving settings.
I would suggest to enable logging on her router (if possible) and to check the MAC address of all devices that connect to her home Wi-Fi.
On smartphones, tablets, and computers, it should be easy to find in the settings (but check if they've set up a rotating private Wi-Fi address; if so, disable it).
It might be more difficult with other devices: for televisions or other appliances, you might need to unplug them and check the router logs to see if a specific MAC address disconnects at that precise moment.
Ultimately, if you have a MAC address that stays connected all the time or even just occasionally and doesn't match any known device, you have a good candidate for the listening device.
All opinions are my own.