I love the seamless WiFi calling on my Galaxy S2 (running MIUI ROM). When I'm at home or work and have free WiFi, I can make calls for landline prices (and chea

I love the seamless WiFi calling on my Galaxy S2 (running MIUI ROM). When I'm at home or work and have free WiFi, I can make calls for landline prices (and cheaper if the call goes abroad) without launching an additional app etc. When I'm out of WiFi reach, the phone automatically chooses the mobile provider.