Currently I've started some mining and found some applications like Electroneum and Crypto Tab -
https://getcryptotab.com/1171523.
Are these platform working please guide.
Do no waste your time on such application because at the end of the month what you will earn is peanuts and more than that you would have spend on charging those phones and also your phone will get slow and battery will start draining quickly. Thus it is not worth your efforts and time.