Another good idea that doesn't work
Wireless Extender Cell Phone Signal Booster Dual Band YX510 PCS/CEL. Followed instructions to antenna placement. Cell phone signal only got a small boost if placed almost on top of base unit. Enclosed broucher claims we could upgrade the booster and get a better signal for an additional $100+ After a $300 outlay for almost no improvement, I was not about to spend any more. Returned the item.