Samsung S7 disgusting signal

<p>I got my Samsung S7 3 weeks ago from Vodacom store Clearwater Mall. From the moment I hadit I had terrible signal. Calls cut, frequently says 'emergency calls only' and whats apps take ages to go and come through. I took it back after 3 daysso Vodacom could send it away and have it checked out. Samsung sent it back and said that there are no issues with the phone.... And here I sit with this useless and unreliable phone. So so unhappy. Wish I had gone with an Iphone!! But the guy at Vodacom kept telling me it uses much more data and has limited space on the phone...learnt now it was nonsense. I seriously regret getting this phone. My old S3 had better signal and reliability</p>