Fail to restore Iphone 5s on Itunes

I updated my iPhone device to iOS 9, and after a few days, after I turn on the device, the network keeps 'searching'. No signals. I tried to take all suggestions I got from the internet, but everything seemed failed. The final way I can think is to restore it to factory settings, but now I think my phone is finally doomed. I have no idea why. When I tried to force restart it, suddenly there is blue screen. But thank god, I can make it into recovery mode and connect it to iTunes. Then I downloaded the latest iOS update, to restore my phone through iTunes. But then it doesn't end my misery. It stuck in progress bar, i think for almost 3 hours, no progress at all. Im very upset, and I don't know what to do with my phone. Please help. Is the blue screen has something to do with this?