How To Change  iPhone 4S Wi-Fi IC

for this work i used hot air gun, soldering iron, soldering paste, stencil for make legs on the IC and PCB rework station for preheating the board HOT AIR TEMPERATURE MAX- 385ºC HOT AIR AIRFLOW - 1 (ABSOLUTE LOW) SOLDERING IRON TEMPERATURE - 400ºC BOARD PREHEATING MACHINE TEMP - 85ºC (on the video first 11 minute is real time before i remove IC from the board. the board needs time to getting enough hot, it must be very hot before you try to remove IC)