Chosen Solution
How can I get my sim card and change my battery if I have lost the KEY that opens it?
You could use a small paperclip or even ear ring. There is a tiny lever inside the hole. Just insert straight with a small amount of force and it will eject the tray.
Apple Sim Pin also does the trick :) Can be easily purchased from ebay or follow Michael answers :)
Use a U pin instead if it fits, make it straight and put it in the hole till the time you have a new pin .
