I'm on Samsung Note 9 and every once in a while I might hear a little EMI when the track gets silent but otherwise, I have no EMI issues. Which is strange, since I always have mine velcroed to the back of my phone... I dont like to have a dongle just hanging off my phone. I am on wifi 90% of the time and am mostly using full size cans, if that matters.
On the included cable... I thought mine was broken, so I had Amazon another S1. Turns out it wasnt the cable, as the original cable worked fine on the 2nd S1. It just wouldnt work with the first S1 at all. Neither would the new cable. Odd thing is, all the other cables I had would work. Basically, the first S1 I received could work with any cable EXCEPT the Lotoo one!