Recent content by qwk1034

A while ago, I had accidentallupgradeded my Itunes firmware to 4.2.1. It makes my phone running so slow. I don't like this version. I want to back to my 3.0 or little higher. I follow the way for DFU MODE. But every time is goes to RECOVERY MODE. It's so hard to enter DFU MODE. I click shift and...