I go out for coffee every morning. All of the venues I visit have WiFi Access Points. I have trouble with only one. At that one place both my iPhone and iPad always get a self-assigned IP address. Other customers, including those using Apple devices, seem to have no trouble at all. I have tried renewing the lease, forgetting the network and resetting the network settings. (I even did a factory reset of the iPhone for other reasons.) Nothing works. The only way I can connect to the network is if I manually enter the IP address, subnet mask and router address. (I asked other customers about their IP address and worked out what I needed to enter manually.) This place is one of a chain. They all use the same SSID and Password. I can connect fine at all the other venues. It's only this one where I have problems. The only clue is that they are using a ZTE modem at this place. The only other branch where I know the modem brand has a TP-Link. Two questions: Why me? What can I do to fix this?