Currently Being ModeratedFeb 8, 2013 5:22 PM (in response to Bob Dewar)
You cannot pair them via Bluetooth.
If the iPhone 3 (more likely a 3GS as the 3 can only run iOS4.2.1) will do it, use the Wi-Fi as a hotspot and connect to that from the 4.
Currently Being ModeratedFeb 8, 2013 5:34 PM (in response to diesel vdub)
Thanks for your suggestion, but it's *because* the iPhone3GS doesn't offer connection of its Settings->Personal Hotspot wifi service to other devices via wifi (only via Bluetooth or USB) that I had to ask this question. Can you give me the technical reason that an iPhone 3GS and and iPhone 4 cannot pair via Bluetooth?
Currently Being ModeratedFeb 8, 2013 5:44 PM (in response to Bob Dewar)
Because Apple does not allow it.
You can connect your devices to your iPhone or iPad (3rd generation) Wi-Fi + Cellular in the following ways:
Mac or PC iPad or
iPhone Other Wi-Fi
Connection tips Wi-Fi √ √ √ √ Wi-Fi hotspot turns off when no devices are connected. To automatically turn it back on, go to Settings > General > Cellular Data > Personal Hotspot. Bluetooth √ √ Ensure that the other Bluetooth device is discoverable, and use Settings > Bluetooth to pair. USB √ Connect your iPhone or iPad (3rd generation) Wi-Fi + Cellular to your Mac or PC using the USB to Dock Connector cable.
The Wi-Fi network name or Bluetooth name is your device name. The Wi-Fi network uses WPA encryption.
iPhone 3GS can share a connection with USB or Bluetooth. iPhone 4 or later and iPad (3rd generation) Wi-Fi + Cellular can share a connection using Wi-Fi, USB, or Bluetooth.
Currently Being ModeratedFeb 8, 2013 8:35 PM (in response to diesel vdub)
Thanks for the table, but doesn't this contradict with the "iPhone 3GS can share a connection with USB or Bluetooth."? Anyway, be that as it may, if I understand you correctly there is no techinical reason, it's just a marketing decision. Given that a Samsung Galaxy Note II can connect, this would be a case of Apple shooting itself in the foot!
Currently Being ModeratedFeb 9, 2013 3:31 PM (in response to Bob Dewar)
As clearly stated in the table, an iPhone can only connect to another iPhone or iPads personal hotspot via Wi-Fi.
The 3GS cannot share it's Internet connection via Wi-Fi.