H With thanks to EwanC on the BT Forums 

Content is his, formatting is mine. Please let both EwanC and myself know if this is successful or not for you.

Notes in Green are mine. I haven't tried this as I don't have one of the modern phones

Neil

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SUCCESS!! I NOW HAVE BBT UP AND RUNNING ON THE HERO FOR INBOUND AND OUTOUND CALLS! I was sick of waiting on BT for a solution so follow these instructions to get it up and running on the Hero;

The first thing you need is your SIP settings. To retrieve these settings;

1. You need to go to www.bt.com/bbv login with your broadband talk number and password

2. Click configure your equipment (new small window pops up) Click configure 3. When you get to configuration successful copy the full address bar (it’s pretty long) and paste it into notepad This gives you all the information you need Example below is mine 'XXXX' replaces my user and passwords!

http://api.home/voipsetup.api?SIPTransportProtocol=UDP&
SIPTransportPort=5060&
SIPRegistrarAddress=btsip.bt.com&
SIPRegistrarPort=5060&
SIPOutboundProxyAddress=sp2.btsip.bt.net&
SIPOutboundProxyPort=5060&
SIPProxyAddress=btsip.bt.com&
SIPProxyPort=5060&
SIPPhoneNumber1=XXXXXXXXXXXX&
SIPCallerName1=&
SIPUsername1=XXXXXXXXXXXX@btsip.bt.com&
SIPPassword1=XXXXXXXXXXXXXXX&
SIPPhoneNumber2=&
SIPCallerName2=&
SIPUsername2=&
SIPPassword2=&
SIPHashB=bef7168c3e950f2701740c5c3f1f4cf2&
SIPHashC=e9394dcd91df190ccc3153b1f56dcab3&
SIPHashD=06b82e8b407e8136ff14898fc56ad0c3&
SIPHash=bd4e5a2bb86fef284cd3836ce726c1e4

The user name1 and password1 is what you will need for the next bit.

In the next step we will setup the SIP client and apply the settings to the Android phone;

1. Go to the Android Market http://www.android.com/market/ (from your phone as it doesn't work properly on a PC) and download Sipdroid (http://sipdroid.org/)

2. Open Sipdroid, go to the sip account settings and enter the following;

a. Authorization Username = Enter your BBT number here as shown in the settings above which with start with a 44
b. Password = this is NOT your normal BBT password, Enter the password from the settings as highlighted above. (This is 15 characters long and is case sensitive)
c. Server = Enter 62.239.169.196
d. Domain = Enter btsip.bt.com
e. Username/Caller ID = leave this filed blank
f. Port = Enter 5060
g. Protocol = Select UDP

There should be an indicator on the notifications bar, if it’s red then the settings have failed, if its amber it’s trying to register, Green means you’re ready to go! For the past 3 days I have been using Sipdroid over my wifi where calls are really clear better than my previous S710. I’ve yet to test on 3G or Edge. Please let me know if this is successful for you also.