Overall the guide is very good!; I would add the following suggestions: if you are working with badly cracked screen, try putting first a small piece of contact paper first - about the size of the screen - (near the bottom of the phone) and then go with the plastic spudger; this will prevent damage to the case and will help a lot with the suction cup; this also will help with the small pieces of cracked glass preventing them from falling apart, and off course holding the damaged display together.
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