Repair iPhone 6S Plus No Service from vipprogrammer
This post highlights the most effective solutions and workarounds used to address an issue on the Apple iPhone 6s plus, in which the iPhone shows can not read SIM card and No Service or Searching for Network error in the status bar and can’t connect to a cellular network.This kind of phenomenon is usually caused by the launch part. If you come here in search for a fix to this problem, you may give any of these methods a try and see the result. Picture 9-4-1
Disassemble the iPhone by phone opening tools , and carefully take out the motherboard. Using multimeter to measure the diode data of PP_1V85_SMPS4, the diode data only have 59, as shown in picture 9-4-2. Because this voltage is supplied to RF IC, so we remove the RF IC.
After we remove the RF IC, we measure it again; the diode data back to normal, as shown in picture 9-4-3. So we replace the new RF IC on it, we can check it under the microscope , as shown in picture 9-4-4.
Now we turn on iPhone, and test it, the signal is back. However, during the testing process, we found the 3G shows no signal, when we choose 3G signal, it will be no service, 4G and 2G is normal, as shown in picture 9-4-5.
Other signal all is fine except 3G; this trouble is mostly caused by the UMBPA_RF. After we replace the new UMBPA_RF with rework station, 3G signal is normal.
Picture 9-4-6
Finally, test other function on the iPhone 6, all is fine, the repairs are over!
Disassemble the iPhone by phone opening tools , and carefully take out the motherboard. Using multimeter to measure the diode data of PP_1V85_SMPS4, the diode data only have 59, as shown in picture 9-4-2. Because this voltage is supplied to RF IC, so we remove the RF IC.
After we remove the RF IC, we measure it again; the diode data back to normal, as shown in picture 9-4-3. So we replace the new RF IC on it, we can check it under the microscope , as shown in picture 9-4-4.
Now we turn on iPhone, and test it, the signal is back. However, during the testing process, we found the 3G shows no signal, when we choose 3G signal, it will be no service, 4G and 2G is normal, as shown in picture 9-4-5.
Other signal all is fine except 3G; this trouble is mostly caused by the UMBPA_RF. After we replace the new UMBPA_RF with rework station, 3G signal is normal.
Picture 9-4-6
Finally, test other function on the iPhone 6, all is fine, the repairs are over!
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