I am also now getting the same error code zero. Inability to connect to both cameras when on LTE. If I am on a wifi network. Either my home network or another Wi-Fi like at a Starbucks it works. This happened all of a sudden and also same to my brother and a ton of other people posting online so they have changed something at the wyze end or some new incompatibility with connecting via cellular data. Not fun. I recommended these cameras to multiple friends and all having the issue and now I look like an idiot.