cannot connect to personal hotspot ios 7.1 iphone 4

Hey andreas4417,

Thanks for the question. I understand that you are experiencing issues with Personal Hotspot since upgrading to iOS 7.1. The following resource may provide a solution:

iOS: Troubleshooting Personal Hotspot

http://support.apple.com/kb/TS2756

Basic troubleshooting

1. See if your iOS device, computer, and wireless plan all meet the system requirements for Personal Hotspot.

2. Make sure Personal Hotspot is on: Tap Settings > Cellular > Personal Hotspot.

3. Check the Internet connection on your iOS device: Tap Safari and load a new webpage.

4. If one connection type doesn't work, try another. For example, instead of connecting using Wi-Fi, use USB or Bluetooth.

5. Turn Personal Hotspot off and on: Tap Settings > Personal Hotspot or Settings > Cellular > Personal Hotspot.

6. Install the latest version of iOS.

7. Reset your network settings: Tap Settings > General > Reset > Reset Network Settings.

8. If you still see the issue, restore the iPhone.

If you're still experiencing issues, try the steps below. […]

Thanks,

Matt M.

Non of those hellped solve the problem, still not working. After upgrade to iOS 7.1 iPhone 4 is not saving APN for personal hotspot.

A lot of people have the same problem, there is a major thread about it

https://discussions.apple.com/thread/5983517?tstart=0

I found the solution!!!!!!!!!!!!!!!!

Goto www.unlockit.co.nz on your phone browser and you'll be all set in 60 seconds.

I found the solution!!!!!!!!!!!!!!!!

Goto www.unlockit.co.nz on your phone browser and you'll be all set in 60 seconds.