How do you open iPhone 3g case but it stack-up?

To open an iphone 3G case that is stuck, start by using a plastic opening tool or a thin, flat object to gently pry apart the seams of the case. Begin at a corner or edge, applying gentle pressure to avoid damaging the device. If it remains stuck, you can try using a hairdryer to apply slight heat, which may help loosen any adhesive. Be cautious not to overheat the phone or apply too much force while prying it open.