I purchased the Cellular Innovations because I have used them for about six years with my other track and Boost mobile phones and received great reception.  When  I would remove the booster from my phone my calls would not go through as well when I would be in buildings, basement, under bridges or other poor reception areas. I rarely have call drops and the reception is smooth and clear. I can get a call through when other people have to look for a clear signal. I noticed that with my new Boost Mobile android phone without it the reception was good but with it the service was great. I have purchased several for family and friends over the years and they enjoy the clear reception too. It is important that you handle the antenna with care; put the booster in your phone with clean hands; and must be careful in placing it in the correct location as instructed to get the  best reception. It works best if you don't touch the antenna with your fingers, Hold it by the sides or edge; smooth it with a smooth flat card. I use my small library tag. If you put the antenna  into your phone incorrectly it will not work. I like to keep one on hand for a back-up to make changes after about six or seven months of use.  It also makes a nice gift to put into cards for that extra special touch.  The booster is a must have for less expensive phones and a big help for my android phone. I get the best of both worlds, low phone fees, and great reception with the Cellular Innovation antenna. Thanks