Chosen Solution
Occasionally, my phone will refuse to send text messages until reboot. Calling is still functional. This usually happens with an uptime of >24 hours. I have tried using different messaging programs, disabling and re-enabling mobile data, and cleaning the sim card contacts. What could be causing this issue?
I agree with jayeff, I believe its a APN issue. You can google the APN Setting of your carrier and input that into your settings to allow your phone to send certain messages.
