https://www.ifixit.com/en-gb/products/iphone-4-gsm-at-and-t-screen
iPhone 4 (GSM/AT&T) Screen
Replace a cracked glass screen or malfunctioning display compatible with a GSM model iPhone 4.
iphone 4 gsmat tscreen
https://www.imore.com/weekly-mod-diy-repair-broken-screen-attgsm-iphone-4
How to replace a broken iPhone 4 (GSM) screen | iMore
Mar 13, 2018 - Have a shattered or unresponsive screen on your GSM iPhone 4? Let's repair it.
iphone 4 gsmhow toreplacebrokenscreen