I had a galaxy s6 for close to a year and it stopped auto rotating and adjusting brightness automatically so I took it to the verizon store and got a certified new one in the mail. This new phone is CONSTANTLY on 3g, an issue I never had with my previous phone. I literally sit the phone in the same place on my desk and at home and it is either on 3g or searching for service. How can this be rectified and what is causing this?
