DeletedUser10 No one, gives a damn what phone or OS you have as you move in or out of the UK.
If you are on an agencies radar, they will be looking for you in any case, phone or no phone.
Normal Joe public, walk on by, nothing to see here...
I usually ignore things like that, but it's quite amaze me how in such forum as this one, that is not only a forum to discuss things around privacy/security, but also a dedicated place for a hardware(not so cheap to buy on left and right) and something you should invest your time into in order to make things right like setup etc, there are still people like this one, and he's not the only one in here who act like that... I really wonder if it's naivety or actually targeted action. Very weird.