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It is the wrong network time causing it.
Turn off the phone. Remove the battery and also take out the SIM. Wait 2 minute. Put it back and turn it back on without the SIM card. Go to Settings > Date & Time and turn off Auto Update. Set the Date& Time correctly. Turn it off. Put the SIM card back. Turn it on and turn on Date and Time Auto Update on. Time should be back to normal. Now try to send some texts. Does it work ?
Hi Jason, Were you able to try my suggestion to fix it ?