I have Bluetooth turned on on both my iPad and iPhone (using my settings menu). My iPad sees my phone, but my phone doesn't see my iPad, because I previously accidentally told my iPhone to "forget this device" (the iPad). I need to tell the phone to make my iPad discoverable again, but I don't know how to do it. In other words, my iPad is no longer in my iPhone's Bluetooth settings; how do I get it on the list again?Your iPad has to be in the Bluetooth settings menu for your iPhone to be able to see it (this turns on its "discoverable" mode). The PIN code would generally be displayed on the devices at the time you do the pairing.
What you are saying is not quite right. Here's what's listed on my IPAD Bluetooth setup screen:So, your iPad is on the Bluetooth setup screen where it sees a list of devices, and you see your iPhone in the list. While it's in that screen, your iPhone still cannot find it?
By the way, this is the Personal Hotspot functionality, it's just that it happens over Bluetooth instead of Wi-Fi. Personal Hotspot needs to be turned on for this to work. If it is not turned on, they won't show up to each other. (e.g. I don't have Personal Hotspot because I'm on an "unlimited" data plan, and my iPhone and iPad do not see each other in the Bluetooth devices list)
What happens if you go to the Bluetooth screen on your iPad and tap the name of your iPhone to attempt to connect?