All of them are
Open your data connection.... com.microsoft.office now installed on lots of Android phones, I've never opened this ever, it was installed without my permission by the phone vendor.... in two days its sent 839 KB of data across the network. Almost a megabyte.
Now go to Word and lets see what permissions it has. 839kb is photograph sized data.
It has permission to access the camera, audio, accounts, phone, it can draw over other apps.... i.e. it can fake an interface and intercept every interaction. It can view wifi connection has full network access, can wake the phone, add accounts, see all the SD card.
I have never agreed to any Microsoft EULA or used any Microsoft app on the phone. I have never agreed to give it permissions it was given.
This is typical of many apps installed on many phones.
And for some reason the authorities, headed by the Home Office, are totally fine with this situation. Gee, I wonder why? All those competing politicians with their smartphones, unaware of the nature of the device sitting on their desks when they talk in the meetings. Just think how a foreign attacker could shape that democracy to ensure only the people it wants are in power.
And what would such bad actors do? Perhaps they'd turn a countries spying agency against their own country. Perhaps legalize such bulk surveillance to give it legal cover. Perhaps hide the surveillance under a blanket of 'national security' to keep it from legal challenge.