Samsung S5 Mini Endless Issues

Hi,<br> <br> I have a Samsung S5 Mini for over a year now, and from the time I got the phone, I have been having endless issues. The number one issue is the loss of network connection.<br> I booked the phone in last week and the technical guy said that many people have complained about the same issue and this is related to the phone's defective motherboard. I was profoundly disappointed when I picked up the phone on the 11 Nov 2015 and noticed that the report merely stated that all they did was a software upgrade. I have done several software upgrades on the phone and it has never resolved the issues. I have to continually restart my phone to make sure I have a network connection and also to fix the freezing issue. I have missed several important calls from my family and colleagues. <br> <br> Problem #1 - Issues with Network connection<br> Problem #2 - Freezing and crashing problems<br> Problem #3 - Poor battery life<br> <br> Vodacom, please can we resolve these issues urgently. I do not have time to constantly drive to Midrand - Vodaworld and send this phone in for repairs.<br>