I have big fingers, so it was even harder for me than for normal people
I ended up sticking the corner of a credit card under it, then pressing down on the top with my thumb while I pulled the credit card out. Worked quite well and no risk of damage, but I definitely won't be removing the card very often. PITA, especially having to take the battery out. Ah well, if that's the worst problem I have with the phone I'm doing pretty darn well!