So yesterday my iPhone 4 was running a 4.2.1 custom FW with 1.59 baseband therefore its unlocked with Tmobile. Last night I decided to take the plunge and go with the latest 4.3.3 custom FW. The first thing I did was backed up my phone. I opened TU and started the server. I Then installed Pwnage 4.3.3 for Mac. I downloaded the 4.3.3 IPSW from felixburns website and this is the FW I use to create my 4.3.3 custom FW. I then proceeded with iTunes with the option + restore and pointed it towards my 4.3.3 custom FW. Everything went smoothly as iTunes restored my phone but in the end, my iPhone was stucked on the black screen (DFU mode). Luckily for me, I saved my SHSH blob so I went ahead and reverted back to my custom 4.2.1 without a problem. WTF am I doing wrong? Your response is highly appreciated. Thank you.