Don't splurge on a mining rig quite yet. You can still mine cryptocurrency on your phone in some situations.
source https://www.google.com/url?rct=j&sa=t&url=https://thechain.media/how-to-mine-cryptocurrency-on-your-phone&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNHEVPdOeSgjSRL-NHfSHveVVVAv6A