Motorola Flipside :: Can't Send Or Receive Text Messages Due To Low Internal Memory

We got a Flipside for my husband in April, 2011. Since then we have had to do 3 hard resets and he still can't send or receive text messages due to low internal memory. Today, it can no longer connect to the internet. I connected the phone to the computer to try to troubleshoot it and that doesn't work. I really want to throw it out the window! We have always owned Nokia phones and never had this problem. We got the Flipside when his Backflip started acting up, The next day - the Backflip started working.