I recently started using the iPhone 6, and have been noticing some major issues with just my phone. About 20% of the time when I call someone else, I will hear them loudly and clearly saying "hello? hello?" while I'm speaking, which means that they cannot hear me. Also, on many occasions, my call doesn't even go through, going directly to "call failed". Also, I've had several instances where the call drops right in the middle.
For comparison, my co-worker in my office has the exact same plan, with the exact same phone, and has not had any of these problems. From this, I suspect that my antenna is faulty. I've tried resetting network settings and all the usual methods, and am still hearing the exact same problems. Does anyone know the best way to get an exchange?