Hi, I have observed that when a iPhone or any (iPhone) wannabe like Vivo is connected to our wifi network (home) some of the already connected device disconnect to the net get stuck with msg "obtaining IP add" or "cannot obtain IP.." regardless of how many devices are connected. Why is that and can it be prevented? Usually we would turn off the router/modem, unplug, wait, replug then start. It would temporary solve the problem but after sometime one or multiple devices will have no connection.