DON'T USE ZIPHONE ANYMORE.

ZiPhone will make your phone more unstable. ZiPhone will hardcode your WiFi MAC Address to a fixed one and not with your original MAC Address. This is what ZiPhone WiFi fix will do.

Go for the Dev team WiFi fix since u said your WiFi is grey out. Look in iphone-dev.org for the WiFi fix.

Coz it was your lucky day. ZiPhone use the unstable RAMdisk method. It will load everything in memory. Loading big chunks of data in memory is a NO NO coz it can degrade and get corrupted. So our unlucky friend just got pawned by ZiPhone.