buzzing noise from speakers

Hello, in my 2009 Mazda6s with bose speakers, I get a buzzing noise from the speakers when my iPhone is anywhere near the center console, or in the cupholders. In general this is a common problem and there are even some products (EM shields) that claim to fix this issue. But I'm just wondering if this is a poor magnetic shielding issue in my car or if this is on the 09 6s with bose across the board. I don't have this issue in my 07 cx9 with the same iPhone and I didn't have this problem even in my older car. So it bums me out that in a newer car and that too with a premium audio option the quality of the magnetic shielding on the speakers is so poor.
Anyone else faced this issue on the 09 6 with bose speakers?
TIA.

No problem with mine. Clear as a bell........

GSM interferes with even good speakers.

My Blose system interfered BIG TIME.

If my iPhone is over the passenger's seat where my real amp is, it may interfere if it's on EDGE.

My boss' iPhone (original) actually makes my farking speakerphone crackle in my office from the other side of the wall . . .and it's a high quality one :/

-Ernie