I recently purchased an iphone that need the docking/charging port and battery replaced. I purchased new OE replacement parts and repaired the phone but now only have one bar of signal strength. Also, the phone keeps switching between Edge (E) and 3G network. All features (wifi, camera, itune sync etc. on the phone are functioning and all connections that I noticed are tight. does anyone have any ideas on what to do next? I have reset all network connections and retored the phone to the factory settings. Thank you!