Review: Huawei Activa 4G for MetroPCS
The Activa 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 Activa has Google Talk on board, and a MetroPCS-branded IM catch-all app that covers AIM, Windows Live, Yahoo, etc.
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On the social networking front, the Activa 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 Metro's generic app.
The Activa is one of the few devices I've seen ship in recent months without Google+ and/or Google+ Messenger pre-installed. These are Google's own social network and social network-focused IM apps and they have found their way to most new Android devices lately. For whatever reason, they aren't available on the Activa out of the box, but can be downloaded separately from the Google Play Store.