GPS no signal or it take GPS time to find a signal, these are two major problems when we use GPS device. Many factors will affect GPS receivers to receive satellite signals. some barriers or parking deck will interrupt GPS to start receiving a signal. like:
Method (code) to identify each satellite.
The location of the satellite or some information on how to determine it.
Information regarding the amount of time elapsed since the signal left the satellite.
Details on the satellite clock status, etc.
Most GPS receivers allow you to set up a margin …

HTC Touch diamond no gps signal problem and fix. when your HTC TOUCH diamond can’t detect any GPS signal. maybe there is some problem with GPS antenna. you can check : Is your device’s built-in GPS antenna covered by any material with metallic coating (e.g windshield, sticker etc)? These materials may interfere with your GPS signal reception. Since GPS signals from satellites often cannot pass through buildings, please test the GPS outdoors. if you are using an external GPS antenna, please make sure it is securely and properly connected …