To help out those in which their ISP's have blocked blackra1n and ultrasn0w sites/repos (like in the UAE), follow the instructions below to connect to a VPN (Virtual Private Network):
1 - go to i t s h i d d e n . c o m (without spaces) and sign up for a free account.
2 - on iphone go to Settings>General>Network>VPN>Add VPN Configuration
3 - Select PPTP and fill in the following:
Description: I t s H i d d e n . c o m (no spaces)
Server: v p n . i t s h i d d e n . c o m (no spaces)
Account: (place account username)
Password: (place account password)
4 - Press Save
5 - Connect to VPN when connected to your home wireless
6 - Download BlackSn0w/Ultrasn0w and ENJOY!!!!!!
You can also connect to the VPN with your computer to access Blackra1n website (as it is blocked here in the UAE) and download the software.
Hope this helps