Troubleshooting Tips: iPhone 6P No baseband no Modem Firmware

The iPhone 6 Plus no baseband, no modem firmware, what's trouble? Here is the troubleshooting tip.

Go to settings, general, about, there is no modem firmware.

Use phone opening tools to disassemble the iPhone, take out the iPhone motherboard, the iPhone motherboard looks good.

Put it under the microscope, carefully open the CPU shield by Titanium Alloy Tweezers, and then use digital multimeter to measure the resistance value of the bottom pins of the baseband power, the data tested is normal.

Remove the old iPhone baseband power, and then install the new iPhone baseband power, after replacement, test the iPhone, still no baseband.

Now, remove the shield of the iPhone baseband CPU. Under microscope, there are traces of corrosion in the iPhone amplifier power supply IC.

Use QUICK 861DW hot air rework station to heat iPhone amplifier power supply IC, and then take off the iPhone amplifier power supply IC.

Install the iPhone, and go the Settings, now the Modem Firmware has been shown normally.

Finally, re-install the iPhone amplifier power supply IC, and then test it again, the iPhone baseband is there, the iPhone Modem Firmware displays properly.

Some phone fix tools are recommended:

- Phone opening tools

- Titanium Alloy Tweezers

- Digital multimeter

- iPhone baseband CPU

- QUICK 861DW

- Other tools