I tried mining on my phone and my phone's battery is draining fast, not only that, the temperature keeps on increasing in exchange of a small amount satoshi. I guess its not that profitable to take the risk of damaging your phone. just saying...
Yes, android mining is not so much effective as compared to mining with a PC or a miner as android mining will give you a very less profit and also if you do it for long time it is not worth it. Still it is possible to mine bitcoin with android from some snapdragon cups and very less other cups but still it will damage your core and make your mobile a heater if used constantly.
I recommend not too do mining with a phone as it is like a loss as it will damage your mobile and also give you a very less sum of bitcoin.
Yes.It will damage your phone due to overheating. Mining in PC needs of cooler to cool and GPU .In PC needs of highly configure software and storage. So it's hard to mining in Normal Personal Computer. Then how it's easy to mine in small Android phone. I will not recommend you to mine in Android phone for sure.It surely damage your phone.