Currently I’m finishing my Nokia LD-4W external GPS review and one thing that stands out is the added precision and speed of these external units when compared to the internal receivers. That got me thinking: when Nokia builds a phone with a built-in GPS like for example the N96 or N95, due to power and size restriction such GPS units would have to be less powerful than those external ones. The external GPS units are certainly better performers, but they are less convenient as you have an extra unit to carry around. What if they could build an external unit that has its own battery just like one of those external GPS units, but this time it can attach to phone from the back in some sort of a modular design. The consumer could always just buy the phone with its built-in GPS receiver but once they want a better performing unit, they could buy one of these “modular GPS units” that attaches on the back side of the phone without covering the camera. Attaching the unit would also signal the phone to temporarily disable its internal GPS. The users could always remove the module when they would like a thinner, lighter device or attach the unit when they are going on some trip where they need the extra speed and accuracy. The added benefit of such design would come from the fact that the unit would have its own separate battery (just like an external GPS unit), saving the phone’s main battery. Also due to more space being available, the designers would have more room to put in more powerful equipment inside. The end result would like of one those extended protruding N95 batteries like on the picture on the left. Is an attachable modular GPS unit the answer to our GPS problems?