I wonder if somebody could please help me out, or point me in the right direction.
I have recently purchased a 8310 and I am still waiting for my old mobile number to be ported to my new phone.
I would thus like to send txt/sms messgaes from my new Blackberry but either hide the new Blackberry's phone number or have thr SMS shown as coming from my old mobile telephone number.
You can hide your number when making calls but I don't think you can do it for sms.
What you could do however is create an auto text entry where say xx = reply to 0xxxx xxxxxx.
Options > auto text, hit menu key and select new then enter replace xx with 'reply to .... Then at the end of every message simply type xx and hit trackball and those words will appear.
If you've got a data plan and the UK providers have web interfaces to send text messages you can do this through the browser and put the old number in the return. In the US: