I am using Hundi.Online, after using several wallets and cryptocurrency apps I liked it the most. Multi-currency support for fiat, and crypto-currencies on lowest exchange costs, easy and fast. Working pretty well on my Android set.
Online/web wallet is different from a mobile wallet. OP is asking for mobile wallet, not any strange and new web wallet out there. I will not suggest using the wallet mentioned.
Coins.ph is great when you used apps
Coins.ph is not a wallet, it's an account and exchange rather. You can't say it's a wallet if you can't fully control your bitcoins there, coins.ph don't have a feature of exporting of its private keys that's why I will not recommend it to being used for long-term. For best mobile wallet as what other's recommending mycelium is good, you can use greenaddress and samourai wallet too.