One day I lost reception so rather than getting a new phone I made an antenna for it.
Warning: Not responsible for phone damage. Look to youtube to see exact instructions for phone antennas.
Remove the back cover of the phone. Remove the battery. Look for the small round antenna port.
You'll need a coated wire 6.3 inches long. Clean the wire coating off one end and push it into the port.
Put the phone back together leaving the wire exposed to the top of the phone.
Put this antenna cover over the wire. Put your phone case back on.
You should have 1-3 more bars than before.