Q: Why doesn't ipad2 pair with iphone 5 with Bluetooth ?

You need an iPad 3 or newer.

iOS: Understanding Personal Hotspot

http://support.apple.com/kb/HT4517

Use Bluetooth to tether your iPhone, iPod touch, or iPad

http://www.macworld.com/article/1159258/bluetooth_tethering.html

How to Connect an iPad to an iPhone Via Bluetooth Tethering

http://techtips.salon.com/connect-ipad-iphone-via-bluetooth-tethering-25472.html

 Cheers, Tom

They won't pair.

Bluetooth on iOS devices is used to pair ith headphone, speakers and some keyboards. It is not authorized to pair two iOS devices together.

What are you trying to accomplish? Knowing this might help folks here provide a solution.

Ralph9430:

iPad and iPhone pair are most certainly supported to pair two iOS devices together.  Check iOS 7 - it's even a feature - called Airdrop, and uses Bluetooht.

However, Apple iOS 7.02 has broken this.  Pairing that worked on iPad and iPhone with iOS 6, stops working in iOS 7 for some devices.  This includes tethering to iPhone for hotspot.

Bill

lomcevok wrote:

 

iPad and iPhone pair are most certainly supported to pair two iOS devices together.  Check iOS 7 - it's even a feature - called Airdrop, and uses Bluetooht.

Although AirDrop uses BT to find other deices, it does not use BT to transfer files. It uses the faster WiFi.