The back glass on iPhones and Samsung devices is fixed to the device using a permanent adhesive. It’s essentially cemented to the frame. You can get it off but you need a hot air gun. One that’s hot enough to melt solder and you need to apply heat to the back as you use something thin and rigid to pry up the broken glass in sections. Make sure to wear eye protection. This is the cheapest method I know of. You can get a heat gun from Home Depot.

The back glass on iPhones and Samsung devices is fixed to the device using a permanent adhesive. It’s essentially cemented to the frame. You can get it off but you need a hot air gun. One that’s hot enough to melt solder and you need to apply heat to the back as you use something thin and rigid to pry up the broken glass in sections. Make sure to wear eye protection. This is the cheapest method I know of. You can get a heat gun from Home Depot.

The best way to do it is by finding someone with a machine that can burn the cement between the glass and frame with a laser. It’s quick and painless but the machine is expensive.

Face ID will no longer function if the original flex connectors are damaged or replace with new ones. Even if the flex connectors are properly soldered just as they were originall it will still fail. There is some marker in the cables which the module is checking for and if the cables are changed then the marker (most likely the serial number of the flex) will mismatch and fail to work. The same was true with Touch ID as well