mining using a celuller or smartphone phone is not recommended, any type of mining is not recommended. This Pi offers a lot of convenience, but unfortunately Pi has not been registered in any exchanger so far, so if you take into account the advantages and disadvantages will be more prominent in terms of losses, consumption of a lot of cell phone space, internet quota, etc. I think this makes your time a waste. Not to mention the malware that can infect your device.