08-28-2012 05:05 AM
Strangely this only happens on the Blackberry and not on my ancient Nokia!!
My phone went down when I was abroad and I've had this problem since, and yes, with the numbers of the people I most care about!!! ...but have now found the solution...a one that actually works...on another site, so will share with you:
You have to delete the contact from your phone, then send them a text manually, ie. typing their number in. This should send just fine. Then you can re-add them to your address book and text them from there as normal.
Have done this to the numbers that I had trouble with and all are working now.
Hope this helps!! And someone should tell all our service providers!!