Truphone, ever keen to promote its free and low-cost phone services, is appealing to those who want the Apple goodness of an iPhone but don't want to pay large upfront bills or sign up to an extortionate monthly contract. The "solution" is to buy an iPod touch, which is considerably cheaper than an iPhone (but still more expensive than a lot of mobile phones of course) and use Truphone's application to make free calls over Wi-Fi to other Truphone or Google Talk users. There are three fundamental problems with this if you're hoping for an always on, out-of-the-box solution (don't you love those kind of phrases?)...