HTC G1 "phone sd card blank unsupported" Questions

...card->then format SD card. Allowing the phone to format the card usually has better results than formatting it in Windows because it's going to use the correct file system type. Hope this helps ...

...SD card in the phone. If that ALSO doesn't work then you likely have a bad card reader in your phone :'( You'll have to call up your cell phone provider and see what they can do from there. Hope that ...