How to build a cell phone antenna to improve reception in 3 minutes.
I use this wire from RadioShack. It comes in a 3 pack and I use either the red (30 gauge) or green (26 gauge):
Any enamel coated solid copper magnet wire, like the following, should work too:
These wires from Amazon should work too:
An antenna length of 6.33″ is optimized for 800-900 MHz. You can find all sorts of info about your cellphone including the frequencies it uses at www.phonearena.com.