Japanese site Nanapho has uncovered a user agent profile (UAProf) of the Samsung GT-i8350, and apparently its Web browser will be IE9. Now, those following Microsoft stuff closely know that Mango is the first version of WP7 to come with what the company is branding IE9, so that can only mean that this new device will run just that.
The GT-i8350 will have an 800×480 resolution screen (which is the standard resolution for WP7), and will come with support for Bluetooth 2.1, and HSPA+.
The i8350 has also received its very own (blank, for now) page in Samsung's UK support database, pretty much confirming that it's real. You can see a screengrab of that above.
WMPU speculates that this may be the successor to the Omnia 7, Samsung's first WP7 device released last year, which has the model number GT-i8700. However, that may not be the case. The i8350 may just be a lower-end device to accompany that successor onto the market. This is also pure speculation, but let's keep in mind that Samsung likes to increment model numbers for sequels (successor devices). So, for example, the Galaxy S II is GT-i9100 whereas the original Galaxy S was GT-i9000. If Samsung hasn't just changed that strategy, logically it means that the i8350 should be part of the WP7 lineup, yes, but not a successor to the Omnia 7. Perhaps the Omnia 7 will get a higher-specced successor that will be called i8750, or i8800. That would make sense.
source: Unwired View