I heard that mobile mining things but unfortunately all of them are scams so don't find anything that can make you get scam since legit mining needs expensive hardware so think twice about those mobile mining since this is used by scammers since mobile mining sounds easy to do by people that's why they used it to deceive people. If you can't buy mining rigs then better try to invest on mobile mining apps or cloud mining since as I said they are scam and not worthy.