Does the iphone 4 have a spot for a sim card?

Does the iphone 4 have a spot for a sim card?

Yes or i would assume so since there's articles about how to remove it.http://www.gazelle.com/how-to/iphone/sim-card-removal

Depends which version of the iPHone 4
there are 2 versions:
CDMA models which carriers like Verizon an Sprint sell, which don't have SIM card slots
and GSM models, which AT&T sells.

the iPhone 4s and 5 are dual mode (GSM & CDMA), so they also take SIM cards.