Chosen Solution

I saw many answer to the frame unglued from glass displays problem, but I cant find a online store where I can buy a quality display to iphones how I will not have this problem. Any suggestion please?

iFixit sells screens that should not have this glass separating from plastic screen frame issue. The cause of this is either insufficient glue put between the glass and plastic during the screen assembling / manufacturer process or hot melt glue being used. The iPhone housing metal frame isn’t dented inwards or bent in any way right? Also bloated batteries can cause this issue too so you might want to check the battery if it has expanded if you haven’t already.

Best place is to find someone who refurbishes the LCDs, since they will have come across the issue (from LCDs returned to them) and bought original bezels, which actually hold the glass properly. Check first of course, but these companies will refurbish your cracked screens, or they usually have excess stock too. There are some sellers in China who sell “original” LCDs too, but these are usually refurbished with original glass, bezel and backlight.