answer:Glad you mentioned it! I use Runkeeper on an Android phone (AT&T HTC Inspire 4G) on my bike commute. While I am not getting huge discrepancies when it records, lately it has a lot of trouble getting sufficient reception to begin recording. In the past few weeks, about 25% of the time I give up. I’ve been wondering if solar flares might be the cause. Seriously. Hindustan Times – September 27, 2011 Huge solar flare slams into Earth…The strong-to-severe (Kp=8) geomagnetic storm is likely to disrupt GPS signals, radio communications and power grids… New Scientist September 27, 2006 Solar flares will disrupt GPS in 2011…Navigation, power and communications systems that rely on GPS satellite navigation will be disrupted by violent solar activity in 2011, research shows…