Hi, nose wheel is no more braked on planes without "braking bands". Braking bands were used only during production of first 1000 MSN aproximately. I am not sure if can be installed as option. Yes, canceled braking leads to higher vibration in flight deck and with high vibration level (if not eliminated by EFCS software upgrade) can generate F/CTL AIL SERVO FAULT after lift-off and ecam message at 1500" due to EFCS accelerometers sensitvity to such type of vibration...