I’ve had the 3GS for multiform months right away and only not long ago gifted this complaint and only with 2 downloadeed apps. Both the apps have been GPS oriented. The initial time I used Trails it was only for the twenty-five notation expostulate to work. The phone became noticeably prohibited to the hold and it emptied about 40% of the batterey. Used it a integrate some-more times with the same results. By the way, the app is great, though I can’t see it being really utilitarian for an lengthened duration of time. The alternative app is Spyglass. Same results. What would have these app siphon battery and overheat the phone?