Personal Hotspot Broken in iOS 17.2

As soon as I updated the iOS 17 the hotspot stop sharing Internet with my Wi-Fi repeater. After some troubleshooting I figured it out.

For some reason iOS 17 is using the new 192.0.0.1 protocol with no subnet mask but a lot of the older devices don’t work with no mask.

Remembering what IP address was for hotspot IP in iOS 16 i manually entered this address into my old device and Internet started working.

So your device IP address range is 2 thru 15

So pick an ending number that isn’t busy or being used and we will use that number.

I configured my old device too:

IP: 172.20.10.2

Mask: 255.255.255.240

Router: 172.20.10.1

DNS: 172.20.10.1

Boom! Working great again.

Configure the next device that needs to connect to your hotspot with the next sequential number, in this case my next device would be 172.20.10.3

Have fun

FWIW, I briefly connected to the hotspot this morning with default settings and got 192.0.0.2 with gw 192.0.0.1. Then it got disconnected and was not able to reconnect.

After turning off/on hotspot/wifi a few times, I then check with Wireshark again - again, got OFFER from 172.20.10.1 but the client IP offered was 0.0.0.0 - hence the problem. Anyway, the workaround again worked, but Apple needs to be fix this ASAP.

Despite your attempts at various methods, you have yet to explore the crucial step of utilizing the SIM card from your iPhone 12 Pro in alternative devices. This is because the functionality of a Hotspot is contingent upon the carrier rather than the specific device in use.

Please see the pic below to make it clearer that Hotspot is enabled by a Carrier on one SIM and not by the other Carrier in the same iPhone (Dual SIM).

Use these steps first

Restart the iPhone or iPad that provides Personal Hotspot and the other device that needs to connect to Personal Hotspot. Make sure that you have the latest version of iOS. On the iPhone or iPad that provides Personal Hotspot, go to Settings > General > Reset, then tap Reset Network Settings.

If Personal Hotspot is not working on your iPhone or iPad (Wi-Fi

Also, check the following

1. Network coverage and stability
2. Data Balance
3. On your windows (See if WiFi Auto Joins is enabled)
4. Also, check if you have any stronger WiFi signal around your computer.

Ask the Carrier to change the SIM if nothing works.

Interesting - my personal MacBook works without the workaround. Still need to do workaround with my work MacBook.

Here's the thing, I currently have 2 devices connected to my iPhone hotspot and working:

• iPad - 192.0.0.2/32 (default setting)
• work MacBook - 172.20.10.11/28 (the workaround with manual set IP)

¯\_(ツ)_/¯

Thanks @JoeWa - this worked. This had always worked for me until 17.4.0 update. :-(

Firing up Wireshark I saw that Discover, Offer, but then no Request. Somehow my MacBook is not sending request maybe because of malformed offer?

I can confirm that iOS 17.4.0 did not fix this problem so you will have to continue to use the fix post previously. Joe

Any way we can get this to work in a tesla? We have no way of changing IP information in the car.