12-29-2012 02:49 AM
Welcome to BlackBerry Support Forums
As you mentioned you had tried everything so I hope you have entered or your Message Service Number is correct ,Or you can varify it with your Carrier that it is correct. Also have you tried a different SIM on that device or have tried the same SIM on another device because it helps in narrowing the issue.
In addition what OS version you have on your BlackBerry® Torch 9800 ? To know that for OS 6 – 7 = Options > Device > About Device Version > first set of numbers on the third line.
Please check this Knowledge Base also :
KB26097 : Unable to send SMS text messages after upgrading a BlackBerry smartphone to BlackBerry 6.