I have a LNIB Cel-Fi signal booster/repeater from nextivity. It's easy to set up and will give you five bars of signal all throughout your home or business! You must have at least one bar of signal strength on your phone prior to hooking this unit up for this unit to work. I've used it for about 3 months and it works perfect. Only reason for selling is that I changed service providers(Wind) and no longer need this. This unit will only work with Wind AWS 3G. Comes complete with original box and all instruction manuals. Asking $500 or trade for an unlocked White Samsung S III LTE smart phone, or possibly an unlocked white iphone 4s.