Should I/How can I accept ETH for my business?

The answer to the former is most likely yes, but my real question is the latter: which MOBILE wallet do I use to accept ETH?

I am an independent barber at a barbershop. I take all electronic payments through my phone.

I use Square for USD, Mycelium for BTC, and Litewallet for my LTC. I'm also currently offering a 10% discount on anyone who pays in crypto.

I want to accept ETH aswell, so which mobile wallet that gives me FULL control of my private keys should I use?