iPhone Screen Replacement Tutorials:

 

 

iPhone 4:

 

Source: https://www.ifixit.com/Guide/iPhone+4+Display+Assembly+Replacement/11755

 

iPhone 4S:

 

Source: https://www.ifixit.com/Guide/iPhone+4S+Display+Assembly+Replacement/7277

 

iPhone 5:

 

Source: https://www.ifixit.com/Guide/iPhone+5+Display+Assembly+Replacement/10906

 

iPhone 5C:

 

Source: https://www.ifixit.com/Guide/iPhone+5c+Display+Assembly+Replacement/22872

 

iPhone 5S:

 

Source: https://www.ifixit.com/Guide/iPhone+5s+Display+Assembly+Replacement/30962



Disclaimer: Please note that these products have been tested prior to sales, should there be any issues, it could be because of incorrect installation or damage during installation. There would be no refund strictly, please consider this before purchase. Thank you.