I've had mine since last Thursday and I've been having some pretty consistent signal issues. I'm either getting stuck on towers, or being handed off to the net tower very slowly. I'm having to run manual network selections and power cycling 2 - 3 times a day. I've swapped my SIM back into my HTC 8X for a day and had no problems. I don't have another LTE phone to try this with.
Has anyone else seen anything similar?