Re: personal hotspot
You might not have realized it and do you have the same carrier now? You DO have to have this feature enabled by your carrier for iPhone.
Originally Posted by kbartk
EDIT: This comes out of the IOS User Guide for IOS 6 and above.
You can use Personal Hotspot (iPhone 4 or later) to share an Internet connection with a computer or other device—such as an iPod touch, iPad, or other iPhone—connected to your iPhone via Wi-Fi. You can also use Personal Hotspot to share an Internet connection with a computer connected to iPhone via Bluetooth or USB. Personal Hotspot works only if iPhone is connected to the Internet over the cellular data network.
Note: This feature may not be available in all areas. Additional fees may apply. Contact your carrier for more information.
Share an Internet connection: Go to Settings > General > Cellular and tap Set Up Personal Hotspot—if it appears—to set up the service with your carrier.