Figured I'd double check with some people on here to insure im not missing something. I purchased an R7 from amazon ~2 weeks ago and returned Monday due to not getting an rear detection even when sitting next to a K band source (front would detect fine) spoke with uniden support, explained all the testing I had done, and they agreed there appeared to be an issue. Got my replacement yesterday and now a cannot get any front detection but the rear is fine (tested in the same areas as before). Am I missing something here that could be causing this. The units were mounted in the same area of the car so its not anything to do with something blocking the signal. I factory reset both units to ensure there was not a setting or anything I might have messed with and tested both units under highway mode to ensure all signals were at 100% and firmware was updated. Uniden support also agreed that the second unit sounded bad. I really want to like this unit but unless someone here has a miracle suggestion I will be switching to a different brand. Thanks!