Review: LG Connect 4G for MetroPCS
The Connect runs mostly stock Android 2.3 messaging applications, and doesn't offer anything new or unique.
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 same goes for the stock SMS/MMS app, which offers threaded conversations, as always.
As for IM, the Connect has Google Talk on board, and a MetroPCS-branded IM catch-all app that covers AIM, Google Talk, Windows Live, Yahoo, etc.
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On the social networking front, the Connect defaults to the MetroPCS-branded messaging app, which also supports Facebook and Twitter messaging. I'd highly recommend you skip this app entirely and download the native Facebook and Twitter apps. They offer a much richer experience than the generic app.
The Connect is one of the few devices I've seen ship with Google+ and Google+ Messenger pre-installed. These are Google's own social network and social network-focused IM apps. Latitude is thrown in there for good measure.