NOTE: THIS POST WAS WRITTEN FOR IPHONE IOS 4.x. THIS POST MAY NOT NECESSARILY HELP YOU IF YOU ARE EXPERIENCING THE SAME PROBLEM WITH VERSION 6.x AND LATER.
Here is the solution to get Internet tethering (sharing) back if you are suddenly missing Personal Hotspot with iPhone’s iOS 4.3.5 upgrade.
My post about tethering the iPhone Internet connection with the iPad was one of the most popular until Personal Hotspot was introduced in iOS 4.3. I thought it was the end of the problem with tethering. Very short-lived though as iPhone allows the carrier to disable Personal Hotspot. A friend of mine who is on Go Mobile Malta lost his Personal Hotspot function when he upgraded to iOS 4.3.5.
No problem.. this is how we sorted it out! The following works and gets Personal Hotspot and re-enables Internet tethering if your carrier stops it.
1. Take note of your cellular data settings before you proceed. If you don’t complete this step, stop here. The configurations are available at Settings > General > Network > Cellular Data Network.
2. We will now reset these to original factory settings. Settings > General > Reset. Here choose Reset Network Settings. iPhone will ask you to enter your personal code if your passcode lock activated. The phone will reboot to reset. Keep your fingers crossed :)
3. Return to the APN settings screen we talked about in step 1 (Settings > General > Network > Cellular Data Network) and complete all the settings details copied before. You will find that in addition to this there is an Internet Tethering section at the very bottom. Use the same APN key as for the Cellular Data section which you will find at the very top of this screen.
4. Once you have the APN settings complete you need to return to the “Network” screen. Click on the Network back arrow shown below to do this.
5. From the Network screen switch Off the Mobile Data and then switch it On again. You may not need this step but sometimes it helps to kind of reset the data connection with your carrier.
After you have completed the above you will find that there is a Personal Hotspot option in the Settings screen.
And Hey Presto! Enjoy using your mobile Internet connection with other devices like iPad, Macbook or your other laptop while you’re on the go. You can even share your iPhone’s Internet with friends over WiFi or Bluetooth.