Has anyone else noticed beeping sounds on the Boost Mobile network?

I owned the Sanyo Incognito phone and I was on the Boost shrinkage plan but I was annoyed by a beeping sound I would hear often. It made me think another call was coming through and I would check but there was nothing. Has anyone else experienced this? I really like the idea of getting down to $35 a month for my cell phone but I can not deal with that annoying beep again. I'm hoping it was the cell phone I was using. Thanks.