yeah i have pretty much the same problem except as long as i'm in doors the s9 with the diamond work fine the second i go out side though it cuts in and out so bad that it's pretty much useless. good news for me though i only bought the s9 to use while either lifting weights or running on a treadmill, both in my spare room
I kinda always figured though that it had something to do with my giant head blocking the signal outside