This keyboard applied for free to any device who need a full numeric keyboard for a real business related. How to: 1. You need to activate the keyboard in you android smart phone: go to Setting -> select Language and input -> select on any Default Keyboard -> click Add Keyboard -> check on Numeric Keyboard2. set keyboard to default -> go to Setting -> select Language and input -> select Default -> select Numeric Keyboard -> Done2. Testing by open any editor -> enjoy your numeric keyboard.