because the 2.4GHz band with us is completely sealed stuffed in Friedrichshain with about 25 visible SSIDs, I wanted to upgrade and dodge the 5GHz band. Unfortunately, the range so underground that within 100sqm I went through two walls old building no longer receiving. and the performance in the 2.4GHz band is even worse than that of O2 supplied Siemens device. because you wonder what the part here has three huge antennas. Next please.