I just replaced the ear speaker for a customer on an iPhone 4s. After I put the whole phone back together, I started having some problems. The iPhone wouldn't boot off the bat so I plugged it into a wall charger and the battery was dead and charging. I left it on for 20 minutes and the battery was still dead. Pressing the power/lock button will not power on the device. With the battery removed and the device on the charger, it will boot. When it does boot up, there is no service. I have double checked the sim card was properly installed, as well as reset the network settings and turned airplane mode on/off. Wifi is also disabled and not able to be turned on. The phone was working fine when the customer brought it to me. When I powered it down to begin work, the battery had ~50%. I have done countless iPhone screen replacements, and know my way around computers/electronics very well. I have tried a soft reset on this device with no luck, as well as checking all connections and the physical condition of the phone itself. iTunes will not recognize the phone. I'm baffled.