Thus far, no, it is not possible.
Many have tried, none have succeeded.
To our knowledge, the physical hardware is there, it was just never connected during production.
For instance, recently there was a poster on these boards that made contacts across all the parts on the board that were excluded during manufacturing and received very faint voice and broadcast from local stations after hooking his phone to a very strong amplifier.
So, while it should be possible eventually, it is very difficult at the moment and has not been successfully done yet.
Hope this answered your question