pevers

The console of the mic & speaker is probably below the metal ring(case) around the phone, so the home buttoncontacts cannot touch the motherboard below. Open your iPhone again, and make sure that the two lower screws (mic&speaker) are first through this console, and than through the metal ring(case). To repair this, you need to unscrew all three screws of the console. Hope this works for you (worked here a few times already)! Regards, Pim