The unit did a very good job at boosting the cell signal as long as you were within 2 feet of the base unit. As soon as you move away from the base unit the cell phone signal dropped to zero and calls could not be placed. Followed the directions as indicated and they were very helpful, but once again the base unit does not have any power. Do not fall for the 2500 square feet of coverage. The unit has about 4 square feet of coverage.