ARGH !!! Ahoy Matey ! Instead of "side talking" on the N800 / N810, use a bluetooth headset with it. http://www.sidetalkin.com/page-1.html If you do not own a BT headset use the hardwired ear buds which come with the Nokia for your calls, or you "could" use ordinary headphones and the internal mic of the Nokia. One problem using the internal microphone for VOIP calls is that the microphone is so sensitive it picks up all room noise and sends it through to the other party. If you are in a quiet room this is fine, but in a coffee shop, airport, train station, the ambient noise is too great, so forget about it. This applies to "side talking" too. Using the wired Nokia headset or a BTooth headset yields the best results all around. I have 6 SIP services registered on my N800, plus Skype. Calls from all over ring into my N800, and I can place outgoing call to PSTN, and SIP numbers with ease. I do it everyday. In a pinch, I just hold the N800 in front of my face and talk. I do not side talk.