A few days ago, we detailed an ongoing problem with some unlocked Windows Phones, namely that MMS would not work when a new SIM card was placed into the device. On most phones, either the device will auto reconfigure itself or the user can manually input the MMS server settings. Unfortunately, for whatever reason, some Windows Phones don't have the first option, Automatic Data Configuration (ADC), enabled and no Windows Phone has the second ability. In turn, phones sold as unlocked by carriers are not fully functional.
In response, Samsung noted that their phones do not support this function by design. Although in comments to our article, an unverified person named Young Shin claims that they work for Samsung and had this to say:
I'm from Samsung's Windows Phone 7 team. Initially, the Network Profile application was designed to detect network reconfiguration on Samsung WP7 open market devices, it is not possible to reconfigure a carrier-locked device. Currently, Samsung is working on a modification which will enable the unlocked devices to be reconfigured to any other network. This application update should be available in WP7 marketplace by the end of this month. Thanks.
All we can do is wait to see if this is true but until then there is now a homebrew option, developed by "kuerbis" who gave WPCentral an early look. In short, it is Samsung's own Network Profile app (available in their app store) that he has modified to support network and automatic reconfiguration. Of course, you'll need to use ChevronWP7 to jailbreak your phone first, then load this app. And yes, it will even load the correct MMS gateway settings for users.
You can grab the homebrew Samsung Network Profile app by "kuerbis" here. We'll keep track of Samsung's official app as well.