SMS Messages = Sim Card Full

Hi, I have not found a way around this but I was wondering if there is a way to store the text messages in an alternative storage place besides the sim card.  The sim card only holds 30 messages, and I'm constantly having to delete them because it fills up and I cannot get anymore text messages.  Is this just the way it is or has anyone found a solution?

Thanks for the response!  I'm not using messenger or anything.  I'm just talking about texting back and forth to people, I can only hold 30 messages which seems very limited when this phone has a storage card and plenty of free internal memory.  I'd like to keep the conversations I am having, but am obligated to delete them once the sim card fills up, at 30 messages.  I'm hoping there is a way to set this phone to store the messages on the storage card or alternative to the sim card, and be able to store more than 30 messages at a time.  It's looking like it's not an option though, but I thought I'd ask.

Why is it saving it to your Sim card?  It should be saving it to main memory. I was looking at the menu options within a text message and it has a 'Copy to Sim' option but that is not the default storage place.

This is indeed very odd. I also have looked through the settings and cannot find a way to change sms storage. I have a question: What carrier are you with?

I find this odd. If the setting was on the phone, you would have fixed it when you flashed the Dragonstorm rom. That leaves the sim and whatever network you are using. I think we can rule out the network as my eXpo on AT&T stores the texts on the phone (I have about 500 now). Are you using the sim that came with your eXpo? 3G phones won't work right with old 2G sims, don't know if it would cause this. Although I hate to say it (type it?), you may have to get AT&T involved to resolve this.

Ok after chatting with AT&T, it seems that the phone seems to have a defect that the reset are not fixing.  They even said it shouldn't be saving to the sim card.  I apologize for my ignorance as this is my first phone to use a sim card, I just use it and didn't realize something's not right.  They are going to send me a replacement reconditioned one within the next 7 business days.  Thanks again for everyone's help here.  I'll let you know how it goes in the future.   

Just got the new phone a few hours ago, zagged it and dragonstormed it (thanks Dark and everyone else for their help), and now after tinkering I do see it for the better.  The sms text messages now have a different symbol when selecting a message.  What was before just a plain single brownish envelope item now appears a two envelopose overlapping in yellow, which is what the emails symbol look the same except that one's in orange.  I now have a history of texts, almost like keeping a conversation.  Also I've noticed the exchange server with hotmail seems be a lot quicker; whereas I had to use the windows live app to wait 5-10 minutes, the exchange setup seemed to take closer to 20.  No more using windows live for email, and seemingly instantaneous, no way!  Further testing is required.  So is this how it was always supposed to be?   

Ok, the email activesync with hotmail is nowhere near instaneous on here, I must have just gotten lucky.  I sent myself an email recently-20 minutes later finally manually synced it through active sync and send/recieve, and got the email within a minute.  It seems to be very unreliable.  I've sent numerous times throughout last night and today, and it's seemingly very unreliable.  How is it working for you guys?  Getting off topic here and could move this if necessary, but thanks for any input.  Text's are working fine though!