Next, use helical wind Hot Air Gun at 340 °C to heat the card reader. Try to pry up the card reader with a Pry Blade while heating. When the card reader becomes loose, remove the card reader.

Keep checking the card reader area with the Thermal Imager. The temperature of the card reader area shows significant change. Judging from the bitmap, the part that gets hot is the GSM. Then we need to replace the GSM.