Sony Ericsson K850i disassembly
Tools required: Torx 6 screwdriver, Torx 5 screwdriver, plastic tool such as a credit card or guitar plectrum.
Using the torx 5 screwdriver, remove the two screws which hold the battery cover in place (circled).
With the battery cover now removed you can remove the back cover. Run a credit card all the way round the edge of the housing to release the clips which hold it in place.
Your phone should now look like below. Remove the two torx 6 screws at the top of the phone, circled in white. You can now release the front cover. It’s held on by a number of clips that need to be released.
With the front cover removed your phone will look like below. The part circled often falls out when you remove the front cover and people can’t work out where it goes. So if it falls out, this is where it goes!
Lift the keypad part from left to right noting that this part is still attached to the phone by a ribbon connector. This attaches like a plug and socket. Simply lever it up to detach it.
The ribbon from the LCD, circled below, is again attached like a plug and socket. Unplug this.
The LCD screen will be held in place quite tightly by clips around the edge of the housing. Gently slide your credit card underneath the LCD screen to release it.
You should now have the LCD screen removed.
Reverse the whole procedure for reassembly
Classic disassembly 