I have an iPhone 4S with tethering. I'm able to tether my iPad2 and Macbook Pro to the iPhone 4S via bluetooth without any problems.
However, I have an iPhone 4 which refuses to 'see' my iPhone 4S via Bluetooth. I'm able to tether the 4 and the 4S via Wi-Fi. However, for purposes of battery life, I'd prefer to use bluetooth. Any suggestions for trouble-shooting?
View the Correct Answer Unable to connect iphone 4-4S via BT w/ tethering enabled in iPhone Correct Answer , iPhone Wi-Fi, 3G and Bluetooth Faq