BlackBerry 8800 disassembly

Tools required: Torx 5 screwdriver, plastic tool such as a credit card or guitar plectrum

• First remove the battery cover, battery, sim and memory card. Remove the four screws you can see.

• Run something like the edge of a credit card along the join of the bezels on each side of the phone. A little force is required.

• Your phone should now look like below.

• Starting at the bottom of the phone, separate the battery compartment from the rest of the phone. It may need to be levered off near the top of the phone. Just slide your credit card underneath to release the battery compartment.

• Your phone should now look like below. Remove the two screws you can see (circled).

• A connector (circled) attaches the LCD screen to the circuit board of the phone. This attaches like a plug and socket. Simply lift the ribbon connector up, away from the phone to detach it. Lever the LCD from the point shown by the arrow to remove it.

• The LCD should now be loose and can be removed. Reverse the whole procedure for reassembly.

Apple iPhone 3GS disassembly

Tools required: Phillips size 0 screwdriver, plastic tool such as a guitar plectrum or credit card, suction cup, needle/drawing pin/paperclip or something similar.

• First push something like a paper clip into the hole at the top of the phone. This will release the sim holder.

• With the sim holder removed, your phone will look like below.

• At the other end of the phone you'll see two screws. Remove these screws.

• Now attach a suction cup near the bottom of the screen but don't push it on too hard as that could damage the screen. Now hold the bottom of the phone in one hand and slowly pull the suction cup towards you with the other hand. The screen will lift up but will still be attached by three ribbon cables.

• You can now access a number of ribbon cables. The two circled attach like a plug and socket. Just lever up the connectors up to unplug them.

• The next ribbon connector (circled) has a black latch that you flick up to release the ribbon. You can then separate the two parts of the phone.

• Your phone should now look like below.

• Remove the screws on each side of the screen.

• The screws on the other side will be covered by a piece of sticky tape which you'll need to remove.

• Now remove the screw circled in the picture below.

• Slide something like a credit card under the LCD screen to release it.

• You should now have the LCD screen removed. Reverse the whole procedure for reassembly.

Apple iPhone 3G disassembly

Tools required: Phillips size 0 screwdriver, plastic tool such as a guitar plectrum or credit card, suction cup, needle/drawing pin/paperclip or something similar.

• With your phone upright, push something like a paperclip into the hole at the top of the phone. This will release the sim holder.

• With the sim holder released, your phone will look like below.

• Remove the two screws at the other end of the phone.

• Now attach a suction cup near the bottom of the screen. Be careful not to push it on too hard. Now hold the back of the phone in one hand and slowly pull the suction cup towards you with the other hand. The screen will lift up but will still be attached by three ribbons at the other end.

• You can now access a number of ribbon connectors. Each one attaches like a plug and socket. Just lever the two circled connectors up to unplug them.

• The next ribbon connector (circled) has a black latch that you flick up to release the ribbon. You can then lift the LCD away from the phone.

• Your phone should now look like below.

• Remove the screws on each side of the screen.

• The screws on the other side will be covered by a piece of sticky tape which you'll need to peel back.

• Now remove the screw circled below.

• Slide your plastic tool under the LCD screen to release it.

• You should now have the LCD screen removed. Reverse the whole procedure for reassembly.