Why iPhone 6 Hint No service When Insert SIM? Got Fix Here!

IPhone 6 Hint No service When Insert SIM- Two main reasons，Do you know what these two factors are? Follow this article for VIP Pro Shop Team will share the solution from both software and hardware, to help your phone get back to work!



  • Software Solution

1. Switching flight mode: turn on the Airplane mode and then turn it off.

2. Turn on cellular data: if cellular is not set correctly, iPhone might say No service.

3. Restart IPhone: many common issues are resolved with a restart.

4. Re-insert SIM card: put SIM card in the right place.

5. Update IOS:  IOS updates always contain a slew of fixes for less-common software bugs that can cause the no service problem.

If all the software solution can't solve this problem, you need to try hardware solution.


  • Hardware solution

1. Get into IOS to check to About iPhone: there are IMEI, modem firmware and ICCID, but there is no IMEI when dialing *#06#.

2. Disassemble iPhone: remove the iPhone motherboard, put it under the Trinocular Stereo Microscope to check whether there are any obvious scars.

3. Find the REE1F test point: open the WUXINJI Dongle to check iPhone schematic diagram, and the find the testing point of RFFE1 bus is PP3170_RF and PP3171_RF.

4. Measure the diode data: use multimeter to measure the diode data of RFFE1 bus, finding the data of PP3171_RF is too large.

5. Remove CPU: after remove the iPhone baseband CPU, measured the diode data of U1 pin is infinite large. Scratch a circuit near pin U1 and connect it to pin U1 with a enameled wire, the diode data now is normal. Use hot air gun to reball the explosive tin balls on baseband CPU, and then weld baseband CPU to PCB.

6. Test it with oscilloscope: power on iPhone motherboard, and then use UNI-T UT81 Oscilloscope to measure the wave of RFFE1_DATA of PP3171_RF under the state of bare board. The wave is normal. And the wave of RFFE1_CLK of PP3170_RF is normal after the test.

7. Install the iPhone to test: after install the iPhone, get into IOS to test, now the signal is back, iPhone 6 are in service now.



Tips: If you need any cell phone repair technical knowledge, visit professional China Brand Universal Programmer Online Shop - by VIPProgrammer.com.

Comments

  1. Sikander ArshadApril 8, 2020 at 11:06 PM

    Thanks for sharing such a great piece of content. It really helps me and clears so many thoughts running in my mind. Besides, I'm from Pakistan and curious to know iPhone 6 Price in Pakistan.

    ReplyDelete

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