If your iPhone 6S says “No Service”,you can't call phone,send text messages,it's a terrible thing that he's going to affect our work.In this article, I’ll explain why your iPhone says No Service and show you exactly how to fix it.
Recently,received a damaged iPhone from one of customers, it shows no service on the the left top corner of the iPhone 6S screen. How to test and fix this problem?
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In general, there are two types of cell phone faults that have no service.
1. signal receiving part;
2. signal transmitting part.
The iPhone 6s has no service with sim card but it shows operator in the setting, which indicating that there is no problem on the signal reception, so we judge the fault is on the signal transmitting part.
The signal transmitting part is sent out from the RF IC chip through the 2G amplifier chip and then through the iPhone antenna switch chip.
In iPhone repairs, the 2G power amplifier failure probability is very high, so we replace the iPhone 6 2G amplifier U2GPA_RF chip by QUICK 861DW hot rework station and related professional repair tools, but the same failure is still existing, it seems that the 2G amplifier has no problem.
So we have to transfer previous judgement, now we are going to to replace the iPhone 6S radio frequency IC U _WTR_RF chip, it finally shows normal, and also normal for calling or receiving calls.
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Therefore, it is found that the RF IC U_WTR_RF chip damage can also cause cell phone has no service.
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