The operating system Windows Phone 8 opportunity to set a static IP-addresses for the Wi-Fi-network is a standard feature for manufacturers, but unfortunately, not all devices really had such an option. Microsoft has decided to rectify the situation and has released an update of the operating system Windows Phone 8.1 for devices with Lumia Cyan (including Developer Preview), which brings an opportunity to set a static IP.
Find a new function in the settings of Wi-Fi. It is reported that a device like Lumia 625, Lumia 925 and Lumia 525 have already received the update.