Tha canvas a1 from micromax also known as android one series is a best phone.this smartphone have a pure android experience like nexus series.this is a best ota or android version upgradeable smart phone.when it lunched on android kitkat but now running on android 6.0.my android one phone never hangs up or never having any software or hardware issue.the only demerit of this phone is u cant use the internal memory of this phone as ur external sd cards.otherwise the phone is cool.