The Sony Xperia SP has quad-band 2G and up to quad-band 3G connectivity depending on your regional model. Mobile data speeds are an impressive 42 Mbps of HSDPA and 5.8Mbps HSUPA. There is also up to six-band (region dependent) LTE support with 100Mbps of download and 50Mbps of upload speeds.
Local connectivity is covered by dual-band Wi-Fi a/b/g/n with DLNA and Wi-Fi Direct, so you can easily share content from your phone on a DLNA TV or music player. There's also Bluetooth 4.0 with A2DP.
MicroUSB handles the charging and PC connectivity, and there's also USB On-the-go so you can attach external flash drives.
Media Remote isn't preinstalled on the Xperia SP but you can get it off the Google Play Store for free. It will serve as a remote control for DLNA-capable BRAVIA TVs and Sony DVD/Blu-ray players too. There are a few versions of the interface ranging from simply changing the channels to mouse input and viewing disc history. This sort of a remote only works over the Wi-Fi connection.
The Xperia SP also comes with NFC, although that's easy to overlook considering there are no included NFC tags in the retail package (like with other NFC-enabled Xperia models), and the Xperia SmartTags app to manage them is not available eitehr. In the settings though you can find and use Google Wallet and Android Beam functionality.
The Xperia SP comes with Sony's Smart Connect app, which replaces the former LiveWare manager, although the functionality remains basically the same. With Smart connect, you can set your device to do a variety of things, like launch an app or set an alarm, whenever you connect an accessory, e.g. a headset or a charger. If a media app supports the Throw function (like the video player), you can use the Smart Connect app for DLNA functions (sharing screen, etc.).
Finally, if you have an Xperia tablet, Xperia link is a simple app that lets you share the internet connection from your phone to your tablet.
The Xperia SP comes with Google Chrome as the default web browser out of box instead of the generic Android browser. The minimalist interface hasn't changed since Chrome launched on Android.
At the top there's an URL bar with a refresh/stop button next to tabs and settings. You can switch between tabs with a wide horizontal swipe in either direction.
Opening the tabs area reveals a list of tabs which can be closed, again with a left or right swipe. The animation accompanying this action is neat, too.
Chrome is running on the WebKit rendering engine, so underneath the minimalist UI it's basically the same as all Android stock browsers.
Of course, one of Chrome's strengths is its ability to seamlessly sync with the desktop version, using nothing but your Google account. This allows you to open an article on your PC and finish reading it on your mobile phone. It also syncs your bookmarks and favorite sites.
If you are out of Wi-Fi range and want to go easy on your data plan, you can, for example, choose temporarily not to load images. Digging into Chrome's deeper settings, you'll also have the option to turn form auto-fill and storing passwords on or off.
Google Chrome does not support Adobe Flash, and neither does Android Jelly Bean in the first place.
The Xperia SP offers a completely new social hub, replacing the previously popular Timescape. It's called Socialife.
The Socialife is a Sony home-made app that brings together your Facebook, Twitter, YouTube and Google Reader accounts. You have a unified Stream page where you can view every social network notification, ordered chronologically or using the Smart Sorting feature. The latter serves the topics you might find interesting ahead of others.
There is a Post field which from where you can update your Facebook and Twitter statuses.
The service offers four widgets - two for your stream with different visual styles, one for quick social status update and one with quick shortcuts to your social friends. The latter also shows new notifications with small balloons in the upper right corner (the iOS style).