Android phones are well specified when it comes to connectivity, and the Liquid is no different. Wi-Fi, Bluetooth 2.0 and GPS are included by default, and while there's no inbuilt tuner, an FM radio can be downloaded from the Market.
GPS is a little disappointing on the Liquid, as it takes a while to connect to the satellites, and pretty much gives up when in a crowded city at times.
We've had a few handsets that can lock on to your GPS signal from indoors - so we'd have hoped this would have been included in the Liquid as well.
Wi-Fi and Bluetooth are good enough at finding other devices when you need them to - there's no way to send your pictures over the latter, which we still find a strange thing to leave out (although Apple does it with the iPhone too).
PC software with the Acer Liquid is non-existent - it's pretty much just a case of you plugging the phone into your PC, waiting for it to have a think about being connected and then being allowed to transfer files across in mass storage mode.
There doesn't seem to be any dedicated software to allow you to use the Acer Liquid as a mobile modem, and the CD in the box is nothing more than a dedicated user manual.
Acer Sync seemed to be the place to go to connect to your PC - but the interface only offered us the chance to synchronise with Google in the way Android already does, so this seemed a redundant icon.
However, being able to interact with the file system on both the phone and the memory card is vital, and pretty much all we need the connection for (although the internal storage level is rubbish) so we can't criticise this feature too much - although it was irritating not to be able to use the phone as a mobile modem at times.