Guide: Fix iPhone 6/6P SIM card failure in a right way

When using a mobile phone, it is inevitable that some problems will arise. Recently, many people have found that the phone is always unable to detect the SIM card, such as invalid SIM or no SIM card installed warning. We need to fix it step by step.



Frist,Power down iPhone, re-install the SIM card on iPhone SIM card tray, turn it on again and then test it, the iPhone doesn't read or identify SIM card properly.

Second, check iPhone SIM cart circuit diagram on WUXINJI Dongle, the SIM card schematic diagram as shown in picture.



Then, as you can see from picture, The failure with the SIM card is related to the following several aspects

1. SIM care protection tube (it can be removed and not install)

2. SIM card tray is deformed and damaged.

3. The iPhone baseband CPU or baseband power supply is virtual welded or damaged

Last, If the iPhone 6 or iPhone 6 Plus fails to identify the SIM card

1. Use Eject Pin to eject the SIM card tray, and then tack it off to check whether it is damaged or deformed

2. Because the SIM card protection tube VR3101 is easy to short circuit after fell into water, and then it will cause iPhone can't identify the SIM card, we can remove it directly with Precision Titanium Alloy Tweezers. As shown in picture.



3. If the failure still there, please re-install or replace the iPhone baseband power U_PMICRF by QUICK 861DW hot air rework station.

4. Re-install iPhone baseband CPU--U_BB_RF. Retest it. Everything is fine.
For more repair techniques, please visit www.vipfixphone.com.

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