My unit has just been sent back for WiFi and over heating. I would not trust the signal strength meter to judge anything . Test it's speed either with iperf or speed test. This will give an indication of if it's a duff. I was getting 10x less speeds on it compared to any other device. Even directy underneath the access point it was not as fast as my phone in another room on the same network and frequency. I do think this is a generic flaw in this models WiFi antenna and perhaps chipset.