Why can't I recieve text messages from other cell phones?

I had this problem once with another cell and I found out that some of the text messages from other phones, like the LG and PDA phones send with kilobytes that are needed to be "downloaded" through a multi-media package or internet access. If you are able to send texts and they receive them, check with your carrier.
Also, try shutting the phone off and restarting.

Let me know if this helps.