How much is to fix back screen

For the iPhone Service Answer Center click here --> Choose Your Country or Region - Apple Support

Select your country.

For a cost estimate:

- Scroll down to "Get an estimate"

- Enter the service required

- Enter the iPhone model you have

- Enter the version of that model

- Click "Get estimate"

My understanding is the back glass is fused to the case and cannot be replaced separately. The entire phone has to be replaced.