External Antenna for Pocket PC Phone

[OneAngryDwarf]

I'm looking at a site which has some cell phone external antenna's and I'm wondering if any of them would work w/ a T-Mobile Pocket PC Phone (original - US)... does anybody know if any of them would work... I've attached a link to the site i'm looking at...
http://www.alternativewireless.com/cellular-antennas/cell-phone-antenna-adapters/index.html