iphone 8gb no service
 

this iphone has firmware 4.2.1 and i manage to downgrade to 4.1
and baseband was 5.15 and i make it 6.15 i also use diskaid to install cydia and i manage to install cydia ,i reboot phone x2 still no network
i also resert network seting still the same i use ultrasnow 0.9.3
plz tell me where did i go wrong here?

still not unlock bro. try to unlock without wifi or with wifi

run iphonefolder

1. click device name..
2. open private
3. open var..
4. open root
5. open media
6. Inside Media folder,create new folder and rename it "Cydia"
7. Inside Cydia folder,create new folder and rename it "AutoInstall"
8. Inside AutoInstall folder,extract or paste ultrasnow12&mobilesubstrate
for unlocking..
then reboot twice..
your iphone is already unlocked..