The thing about Voice over IP (VoIP) is that once you’ve got it, you really don’t want to use GSM or a landline unless you have to. In offices with IP-based phone systems, VoIP has the added advantage of making people contactable anywhere -- a definite advantage in many circumstances. Handhelds with Wi-Fi and the ability to accommodate SIM cards are ideally placed to offer convenient support for both VoIP and GSM communications, and <a href="http://www.ciceronetworks.com/">Cicero Networks </a>has launched a ‘converged softphone’ that provides this via a single user interface. We tested CiceroPhone with an <a href="http://reviews.zdnet.co.uk/hardware/handhelds/0,39023880,39165698,00.htm">HP iPAQ h6340</a> -- there is also a Windows Mobile smartphone version, which we will be examining in due course.