Android Is there anyway to use an Android as a Bluetooth Heaset?

[Xuphor]

I already have a (crappy old non-android) cell phone, it supports connecting a bluetooth headset to it to talk/answer/etc calls with, so you never have to take the phone out of your pocket. I'm wondering if there is an android app/hack/anything that lets your android device function as a bluetooth headset, in this regard. The crappy cell phone still is technically the one answering/making all the calls, but it would stay in your pocket the entire time. Since it'd be connected via Bluetooth as a headset, the Android device would be the thing that rings, the thing you talk on, the thing you hang up on, etc.

Is there any such a way to do this? I tried searching Google, but 80% of the threads were unrelated entirely, and of the 20% that are about this, most of them said to use Google Voice (which is completely irrelevant). The other ones never found a answer.

EDIT: I just found out that my crappy cell phone has Bluetooth sim-card access. If it's not possible to use an android as a headset, can I somehowly use my android to connect via bluetooth, and use my other phone's sim card?

 

[pokefloote]

I have only heard of android to android connections like that. For instance, I could connect my tablet to my phone via bluetooth and have my tablet receive all of my text messages instead of the phone.

Since it's a non-android phone you're working with... I don't think it would work. It needs an interface, setup menus, blahblahblah . :/

 

[Xuphor]

I was afraid of that.

Stupid question: Can androids just do this normally, via settings? If someone that has a android device and a non-android phone could see what happens when you join them via bluetooth, that'd be great. Just see what options are available when trying to make the non-android the master of the 2.

Also, what about my bluetooth sim-card theory?

 

[Originality]

When I tried this years ago with my Moto RAZR v3im and my HTC Dream, all it did was allow basic file transfer. I couldn't even get it to share contacts as I had with other non-android phones. Music or picture files were the limit.

If things have changed now with BT 4.0, I wouldn't know since I never use BT anymore.