There is a thread which say that people with No-Wifi who had tryed to Fix that with the "Fix No-Wifi Issue" in Ziphone 3.0 have their Wifi MAC adress changed which is a problem if you have two computer/iphone/PSP or whatever you want with the same adress in the same network, they will not be able to connect to the network.
To fix that we are going to use Ziphone.
1) Go to Advencced tab, then select Ierase 3.9 Baseband and press "Start Advanced Proces", wait until your iphone reboot, you'll have error "repair needed"
2) Go to Advencced tab, then select Unlock phone for any carrier", and press "Start Advanced Proces", wait until your iphone reboot
That's done, you have retreive your original wifi MAC address and original IMEI (unless you ask Ziphone to change it on step 2).
Tell me if it is possible to have had the No-Wifi Issue, then using Ziphone "FIX No-Wifi Issue" and stay on Bootloader 4.6
Please tell me if that's work :p