I had the stick also as a test device with me and had with various routers that work together otherwise flawlessly with a variety of devices, wireless massive problems that have spoiled me all the otherwise good device. A first update has brought no improvement, and the Forum of Rikomagic one can read that I did not have to go it alone experience. Who wants to read the test, should find him, if he / she is looking at Google for "Rikomagic MK802 IV S in the test".