configure Static Ip Address Iphone

I understand your post up to the following:

I go to the wireless option and chose inside the option Static IP ( configure the correct option)

then the following confuses me:

but when leave the option "clean" and return to DHCP.

What does that mean?

Is the wifi router you are connecting to setup to assign a static IP to that device? You cannot just arbitrarily give your device a static IP. The network has to have it reserved and assigned for that device.

If that router is setup to assign IPs by DHCP, then you entering an IP on the device is not going to change the router, which will simply not recognize your choice of IP.

The router is probably set up to provide the iPad with a static IP, so it works. If you have not assigned a network static IP for the iPhone in the router settings then you need to do that first. You have to reserve and assign each specific IP and device you wish to be static in the network before you can assign that IP on the device.

It has nothing to do with iOS versions or device. You have to setup the network first, then give the reserved static IP to the device. Otherwise, the network simply does not recognize that IP as reserved for a static IP, and the DHCP server overrides the setting on the device.

Check your wifi router's settings and make sure the IP you are trying to use is set aside as a static IP in the router's table. Otherwise, it's never going to work. A device cannot arbitrarily assign itself a static IP on a network. It can only use a static IP if that specific IP has been set aside and reserved for it in the router's settings.

I'm sure you can (though not an ideal setup) set static IP on the device without reserving the IP on the DHCP server. Perhaps iOS 10 has something to do with the settings reverting back to DHCP.

Maiari,

Try forgetting your WiFi network and join back in. Then set static IP. It's also possible that the IP you're trying to use is already in use (by another device in the same network). When there's a conflict, your device reverts back to DHCP. Try using a different IP (add 1 to the last group).

I've never known that to work worth a dang. it just leads to dropped connections, or the device failing to reconnect when you leave and come back to the network or other connection or performance issues. On the contrary, when I've assigned static IPs by MAC address in my wifi router tables, it works seemlessly. Most consumer grade wifi router's DHCP management just doesn't seem to play at all well with self assigned IPs, in my experience.

Also, to my old fashioned thinking, a truly "static" IP is one the network itself has reserved and assigned to a device in its routing table. A self assigned IP is not strictly speaking a static IP as the network controller can ignore or over ride it (either unintentionally, or by design).

Tap Settings > General > Reset > Reset Network Settings. Retry entering manual IP.