That question is unanswerable unless you take and open it up and check but other than that you have to find it out your selves.
Yes
yes
Not all cell phones are compatible with SIM cards. Some only work with a contract, and you need to unlock the phone before you can use a SIM card.
A lot of cell phones are made a year but I don't know the exact # of cell phones though
nope just hotel room cards
yes you can? on some phones cause on some phones or on all phones are an app
GSM was created for cell phones in the early 80's. GSM allows you to swap out SIM cards to change your cell phone number, which is an extremely convenient feature.
cell phones usually have calculators on them which can do math...also the structure of the phone uses measurements and stuff :3
No cell phone contract phones typcially cost more out of pocket when you first begin. There aren't any deposits that you have to worry about so that is a plus. You can find these cell phones at any store that sells cell phones, like Wal-Mart, RadioShack and even Target.
Cingular, now The New AT&T, utilizes SIM cards for their phones. If you are looking for a pre owned cell phone for Cingular, I have included a link below. Hope this helps.
Not necessarily. The phone will have to specifically say it accepts sdhc cards.
There is no such thing as a CDMA SIM card, since CDMA phones do not use SIM cards.