Download ringtones for Phones NIU Niutek 3G 4.0 N309. These ringtones are free to download. The free ringtones are in midi mp3 wav format and will work on your Phones NIU Niutek 3G 4.0 N309. Scroll down to download these free ringtones for NIU Niutek 3G 4.0 N309 by Phones and personalise your Phones.