Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7) I just picked up a used iPhone 3GS on eBay. It's like new and still in the original warranty period. I am experiencing a weird phenomena with it that I cannot explain. Well, actually two weird issues. I had an iPhone before but left for anothe phone but now I'm back. This phone (running 4.1) shows almost no signal anywhere. I'm looking at my phone showing me 1 bar of signal. My old phone in this same location had a full signal as did my old iPhone 3GS. My wife has an iPhone 3GS, also running 4.1, and it shows all 5 bars. The phones are literally inches from one another. Also, I'm getting crap for battery life. I unplugged my phone at 11am after charging all night. I made one phone call (about 30 minutes) and browsed the web and checked email for about 15 minutes. The battery was at 74% after just that little bit of use. Now it's only been unplugged for 5 hours and, in addition to the a I've only made one other call and played Angry Birds for 10 minutes and I'm down to 61%. This seems like it may be related more the the weak signal than an actual battery problem but in not sure. Any tips? Would a full restore help? If I can't figure something out, I'm going to try the Genius Bar over the weekend.