Top 7 Smartphone Mobile OS Vs Android

Android os is the most popular os for smartphone.But this 21st century my friends,competition of giving best is also on this field.So many smartphone os maker company launch their own os for mobile.
Top 7 Smartphone Mobile OS Vs Android

Android OS Alternative 


IOS 8 


UBUNTU Mobile Touch OS


Firefox OS


Tizen


Salifish




Blackberry OS 10



Windows Phone 8.1