Register now or log in to join your professional community.
Because android is free programming platform.there may be many bugs in marshmallow in which programmerare still yet to fix many problem such as battery problem,wifi conncetion problem,overheating issues.large data consumpiton issues etc,so its may be resaon for users not for upgrading in android 6.
Because manufacturers are lazy and don't wanna update their phone's OS. It's also a commercial tactic plan.
Do you need help in adding the right keywords to your CV? Let our CV writing experts help you.