Download a wallet on your phone, I guess. As long as you are not downloading unverified APKs left and right, your 10$ should be pretty safe. I can even bet a 10$ on it!
I guess you'll be more worried about a $200-$4000 phone over $10. If you are planning to get hundreds or thousands of dollars worth of crypto, buy a hardware wallet. They are hack proof and you can write down the seed phrase as a backup in case the wallet bricks.