GPS and mobile phone navigation have come on in leaps and bounds in recent years, BUT BE WARNED. In the Highlands there is often no signal and journeys in rough country often take longer than planned and battery power is all important. ALWAYS take a good map AND a compass and know how to use them. I cannot tell you how many times that I have come accross people totally lost and all they are navigating by is some form of electronic navigation. Towns are fine, at least, you can ask someone, out on the hill is another matter entirely! Sorry to be boring about this, but............