I use a Huawei smartphone and really like it, but I was doing some network analysis with it with a friend of mine who works in penetration testing and found an odd signal from it when it connects to a machine via USB. It sends some packets of information over http to I think one of Huawei's servers which I have not looked any further into, upon reading this I may do just that later on in the week to find out more about this data and the server it pings, and why it would do so over http and not https. It was a bit concerning anyway, just plugging in to charge doesn't really warrant any internet data connections.