[bbob]

When using a fritzbox sip device I use the following format

username
password

to get callerid if fill in the callerid in the username field
in the password field i type password:username

don't forget the : in the middle

usernamefield: callerid number
passwordfield: password:username

This way I get caller id using betamax on my sip device. don't know how this works on a nokia but play around with it. For me it has been working several years like this.