The OS is on the ROM. If your remove the card you can still use the phone.
How do I do the "hard reset?" i know how to do it by going through the settings menu but I assume I can't do that when I put a new mirco sd card in. Thanks..
To replace the battery half of the back of the case comes off.
Very gently the other half of the back of the case will come off the same way. Next to the sim card slot there is a micro sd card slot, with the card in it. However to remove the card it looks like all the screws will have to come out and then the plastic cover removed as the slot is set in it. See picture.
What class 4 card did you order?
Iv been looking the only one I can find is the Kingston one?
Is that any good?