Well as many mentioned, it would be Electrum and Coinomi. Electrum has a desktop version as well and that's quite nice. However don't hold too many coins in such mobile wallet.
I don't trust any wifi networks that I connect in public and you never know when the hacker has the access to your phone already.
Consider investing for an hardware wallet as well.
True! The problem with mobile wallet is its security. We all know that when we connect with an open wifi network, it's easier to be attacked than hard-cable connections. Therefore, as long as those mobile wallets don't provide a certain security method to secure our wallet, I wouldn't choose them to hold tokens!