Review: Samsung Conquer 4G
The Conquer 4G runs all the stock Android 2.3 messaging applications, and doesn't offer anything new, not even from the Sprint ID packs.
It has the generic email app for POP/IMAP/Exchange email, and the dedicated Gmail application for Google users. Both of these applications are capable and time-tested.
The stock SMS/MMS app is loaded on the Conquer 4G, and I didn't notice any different or unusual behavior with it. It offers threaded conversations, as always.
As for IM, the Conquer 4G has GTalk on board, and nothing else. If you use Yahoo, Windows Live or AIM, you'll have to seek out third-party apps from the Android Market.
On the social networking front, the Conquer 4G includes both Facebook and Twitter, along with good home screen widgets for both apps. Google+ isn't on board, but Google Latitude is. The Conquer 4G also includes the Qik video chatting application, which can be used with the user-facing camera. In order for this app to work, you have to set up a Qik account, and then contact others who also use Qik. It won't, for example, work with another device running Skype. Though this service works via 3G and 4G, I find the best results come when used over Wi-Fi.