How to fix WIFI cannot be turned on and no WIFI address on iPhone 6

Have you ever met your mobile data runs out, but at this time, you found a WIFI available and like find a life-saving straw, you are so excited to turn on your WIFI, but is no response and can't find WIFI address. In this time, your mood will be covered by dark clouds. Just relax, Vipprog can help you to solve this problem.

Firstly, disassemble the iPhone then you can found the Wi-Fi chip has been changed. First remove the Wi-Fi chip and then use multimeter to measure the diode data on the bonding pad, we can find the pin 26 and pin 28 on the Wi-Fi chip bonding pad are line-to-ground short circuit. After checking the circuit diagram, we can know the self-output electricity of Wi-Fi chip powers the two pins. As shown in picture 1-1, it is abnormal to power a line-to-ground short circuit.

                                                                 1-1

Next,By looking at picture 1-2, we know pin 26 and pin 28 only connect a capacitance C5201_RF and a inductance L5201_RF, so the only short circuit is C5201_RF. You can find the C5201_RF location by checking the PCB circuit diagram. as shown in picture 1-3.  As shown in picture 1-11, we can find the C5201_RF material object location in the PCB image.

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1-3

Finally, remove the capacitance and then measure the iPhone diode. The line-to-ground short circuit disappears. Weld a capacitance removed from the same place of the stripper and energize Wi-Fi chip after reassembling. Turn iPhone on and enter system to test. Wi-Fi can be turned on normally and trouble is removed. you can normally use WIFI and your mood will be like rain after the rainbow.

Solve the iPhone 6 WIFI weak signal

Most people have met WIFI can be turned on, but the signal is weak or it has no signal when being away from the router. It's very frustrate and anxious. Now, you can kill the problem. Before you begin to repair, you need some phone repair toolsand accessories. Well, when you are prepared these tools, let's start to solve the problem.

First of all, determine if the WIFI signal is weak. You can only find one or two WIFI hotspot and the signal is weak when power is applied, but trouble-free iPhone can search more than ten hotspots. So, it's problem can be judged as weak signal.

Secondly, disassemble the iPhone by using phone opening tools and the WIFI chip is found to be replaced. You can use an accessory antenna to replace the peripheral antenna circuit of the chip and then determine whether the chip is workable. This way is to use a 10cm enameled wire acting as antenna starting from C5213_RF near WIFI, as shown below picture 1-1

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Thirdly, turn on the iPhone again when finish above step, you can found many WIFI hotspots. In the meantime, the signal has been normal. The main reason is the WIFI signal filter FL_CELL_WIF_RF has been damaged. It is no effect that removing filter on the iPhone operation. In the case of repair, we often use the enameled wire directly ignoring the filter, like pcb picture 1-2 as follows

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Finally, when the enameled wire is placed well and after smearing the enameled wire with green oil and assembling test, like picture 1-3 as follows. The trouble was solved and the signal becomes normal. You can continue to use WIFI to browse the web and do not have to worry about the weak signal. 

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More details can consult Vipprogrammer.