The new iPhone service plans do not include any text messaging without an extra monthly or per message fee, but don't worry because here are 3 free texting alternatives that you can access right on your iPhone.
Why Pay for Texts When There are Free Alternatives?
While the current iPhone data plan included 200 text messages in the price, this is not the case for the next generation iPhone. If you want texting with your 3G iPhone plan, you'll need to pay $5/month extra. While some of you may be willing to just pay the extra fee, there are few other options you may want to consider.
One good service is TxtDrop, which lets you access a webapp optimized for the iPhone and send free text messages. Just go to http://www.txtdrop.com/iphone. It is completely free because it is ad-supported by a small Adsense unit at the bottom. Simply input your email address (which serves as the "sender"), the number of your recipient, and the message. There may be some truncation for the text message because the TxtDrop URL is added to the end of the message, so just be sparing on your character use.
Use the Recipient's Carrier
Aside from TxtDrop and similar services, each of the carriers offers the same kind of free texting. If you know the carrier your recipient is using, you can use one of the following, as listed by iPhoneFreak.com: "For Verison sending an email to [their 10 digit number]@vtext.com will convert your message into a text message and go to that number. AT&T uses [their 10 digit number]@txt.att.net and Alltel uses [their 10 digit number]@message.alltel.com."
Of course you can't reply directly to these texts because they use a service number, not the number of the sender, but they do link to the sender's email address, so there is at least some option to continue the conversation.
Another possible option definitely worth mentioning is textPlus by GOGII. This app lets you send unlimited text messages all for free. It also allows for multiple users use the same texting thread, much like a chat room. For more information, read the short review of textPlus which can be found in the middle of the article.
Another hope might lie in instant messaging services like IM+ for iPhone, provided that the people you want to message have an IM program too. As the applications for IM get better, hopefully the integration with SMS will also improve.