I have a RE300 and it is working fine with numerous devices (a laptop, an ipad, appleTV and my Iphone).   However, when I connect my girlfriend's iphone, it does not get any internet connectivity.   I can get her iphone to connect to the RE300, but for some reason, there is no internet connection.   I have not had this issue with any other devices, and they all continue to work fine while her iphone does not. 

When I open the tether app, I can see all of the devices that are connected, including my girlfriend's iphone.  However, the other devices have appropriate names while her phone just says "unknown".  Also, the IP displayed for her device is 0.0.0.0.  All the other devices have regular IP addresses.

Does anyone have any tips to resolve this?   It's driving me nuts (and her as well).