Yes, I have this phone and also wife has a galaxy s by samsung.
Mine is anycall. I bought it cheap from somebody who told me that it will not be able to do texts for over 80 words and never be able to do mms.....I also found no answers online.
I live in usa and have t-mobile and am running froyo 2.2
I can now send text messages up to 160 words and also send/receive pics and videos in texts as well. Go to the android market. Download SMSgo pro for free. You will then have to mess around a bit with the setting on smsgopro and your phone....this was fairly easy and only took a few minutes. Just got to mms settings on the gosmspro application...
So, it has been working flawless - texting photos, videos, etc.
If you need more info on settings, let me know and I will look at my anycall galaxy s to see what the setting are...