See the post at 1Pad [Google Translate].
According to that post, Samsung is shipping the Galaxy Note 3 phone with USB 3.0 turned off by default.
It turns out USB 3.0 can interfere with WiFi too. See: Wireless Witch: The Truth About USB 3.0 and Wi-Fi Interference .
Mac owners have also known about USB 3,0 vs WiFi: USB 3.0 Hard Drives Can Cause Wi-Fi Interference.
For more, see this Intel White Paper: USB 3.0* Radio Frequency Interference Impact on 2.4GHz Wireless Devices [PDF link].
It seems wireless router makers are alleviating the issue, so why can’t phone makers do it too?
Since the Tomato T2 tablet from China has a USB 3,0 port, potential buyers should keep this issue in mind.