[tommy950]

I own Blackberry Curve 8310 v.4.5. I noticed some time ago that my text messages do not get delivered to T-Mobile and Verizon customers at all when I send them. I did not test with Sprint, but I assume I would have the same problem. However, I have no problem receiving text from them. I have no problem with messaging inside network (ATT), messages get sent and received fine. I went to the store, swaped sim card, it did not help. I called in customer support, they checked setting, they tested network and they reported no issues. I get no error messages. Any clue?