I’ve used 3M black sticker to put the screen and frame together. But the effect is not good. The bottom of the screen is not stick well. The proximity sensor light is revealed from the bottom. There has an obvious gap between the screen & the frame. The link of tools is in the description. Check the link of the replacement in the description. Power off the phone. Take out the SIM card tray. Undo 2 small T2 screws. You need two plastic opening tools. Slide the tool to open a gap. Be careful not to scratch the metal back panel. Then insert another tool. Heat the top side of the screen about 3 to 5 min. Just heat the white part of the screen. Then insert a little knife or a thin card to open a gap. Insert a card from the little gap. Another card. The adhesive will stick together when its cool down. So heat again. The screen is hot after heating. You can wrap the screen in a cloth. Slide the plastic card to cut the adhesive. The adhesive is sticky. You need to put more efforts. Keep sliding. If you feel it is too tight. Heat the adhesive when its cool down. It can help loosen the adhesive. The adhesive is white and transparent. Then use a plastic opening tool to separate the side of the screen. The side is narrow. The same to the another side. Now you can separate the screen from the frame on the top side. Mind the screen flex underneath. Heat up the bottom side. The bottom side is a tough part to remove. The screen adhesive is very sticky. Mind the proximity sensor flex underneath. The proximity sensor also sticky. Oh no!The little black thing is the proximity sensor. I broken it. That means I need to replace a new one. Heat again. Put some effort to cut the adhesive. Mind the screen flex & proximity sensor flex connector here. Remove the proximity sensor flex if yours’ still work. Also remove the dust mesh from the old screen. Put the proximity sensor flex to the new screen. Make it fit well. This model of the device is A3000. Different model has different replacement parts. Check your model before ordering a new screen. Put dust mesh to the new screen. Install the components. Power on the phone. Open the dial-pad,input *#808#. Screen test Normal color. Touch screen test. Pass!! Keypad test. Settings. App-recent button. Back button. All good. Power off. This screen adhesive is from Witrigs only. It’s sticky than other adhesive in the market. We make this adhesive from a factory. Discard unwanted parts. Tear the white film off first. Then tear the blue film. The same to the bottom side. Tear off the white film first. Put the sticker in place & make it fit well. Tear the blue film off. Then put the screen & frame together. Mind the screen & proximity sensor connector. Make them stick well. Make sure that two connectors are through the frame. Put back signal cable. And the earpiece. NO OBVIOUS GAP. No revealing proximity sensor light. Better than which used ordinary 3M black sticker.