IPhone 4S doesn't send text messages or iMessages?

Sometimesmy messages send. Recently it's been acting up. When I send, it would say, "Sending…" but the progress bar thing stops just before it reaches the end for both SMS and iMessage. Also, sometimes when I go to my messages, it would take a long time, then redirect me to the "New Message" page. And sometimes when I check messages, it would only show the last thing they replied or the last thing I replied with. Every time these things happen, I reset my phone, then it will be okay again, but resetting it is starting to get annoying because I do this at least once a day. Is my phone just getting old or can I do something to fix it?

Turn iMessages off all together in your settings and it should fix this.