Since I have done the iOS 4.3.5 update the Personal Hotspot drops the Internet Connection every approx. 10 minutes

Hi,

I'm having the following issue: sincer i've done the iOS 4.3.5 update the Personal Hotspot doesn't work fine anymore on my iPhone 4. My Windows 7 Laptop or the ipad are loosing connection each more or less 10 minutes. I have tried to connect the phone to the Laptop via Cable (not only WiFi) and I have the same issue.

The phone is neverlocked.

I've already tried to reset the network settings but the issue is still there.

Does anyone have an ideea?