A number of my readers are using an unofficial sim card on the iPhone, which is hacktivated and unlocked using blackra1n rc3 and blacksn0w. They claimed that YouTube, Push and Wi-Fi are not working after they had installed both GeoHotz’s iPhone jailbreak and unlock tools on their iPhone due to the bugs found on the blackra1n hacktivation and blacksn0w unlock. If you’re also having these issues on your iPhone, you can do the following.
On your iPhone, navigate to Settings, General, Reset and select Reset Network Settings. After iPhone restarted, try to connect your iPhone to the Wi-Fi again.
YouTube and Push Fix
1. Launch cydia installer, add http://cydia.iphoneil.net/ to the sources.
2. After the sources has been added and updated, type “push fix” to search and select “Push Fix”.
3. Tap “Install” follow by “Confirm” buttons to stall Push Fix installation.
4. Once the installation has completed, press “Reboot Device”. Try to launch YouTube and the Push feature after your iPhone is rebooted.
All these issues should be fixed if you’ve performed the above 2 fixes on your iPhone. Anyway, if you need any help, drop your message on the comment below.