So I have three R510 hot spots in my house. Two are right below each other...i.e. the one is on a 1st floor and the second is on the 2nd floor. The 3rd one is in the bathroom few rooms away. Now when I am near the bathroom one (so master bedroom, kitchen) the phone works fine, but when I am near the two other ones the phone keeps loosing connection and the wifi keeps dropping. what's going on? I have tried, rebooting and upgrading them but still the same. Both are running the latest firmware that was released few weeks ago.