iPhone X No signal failure repair.

iPhone X No signal failure repair. 

Workaround: 
Machine model: iPhone X.  
Malfunction phenomenon: mobile phoneUnable to activate without signal. 
Maintenance process: 
A customer received an iPhone X, and the fault was that the mobile phone could not be activated. When we press the exclamation mark, we knew that the mobile phone did not have IMEI. If the mobile phone did not have Baseband, and it was brushed and did not have Baseband, we first carried out separate on the motherboard. After separation, we saw that the mobile phone had obviously Baseband, which was just two of Baseband.We scraped the dropped points off Solder Mask on poor line repairing, then welding and Update System, and found that the mobile phone IMEI has returned, indicating that the mobile phone has Baseband, which can normally activate the fault. Here,iPhone X.mobile phoneFailure repair cannot be activated without a signal. 

iPhone X Failure to activate fault repair without signal Figure 1. 

iPhone X Failure to activate fault repair without signal Figure 2. 

iPhone X Failure to activate fault repair without signal Figure 3. 

iPhone X Trouble shooting cannot be activated without signal Figure 4. 

iPhone X Trouble shooting cannot be activated without signal Figure 5.